http://www.redhat.com/docs/manuals/cert-system/pdf/cms601custom.pdf
Use GET http://cats.bos.redhat.com:9180/ca/ee/ca/getBySerial?serialNumber=14
(yes, that's a hex serial number).

- older stuff -

http://www.redhat.com/docs/manuals/cert-system/8.0/cli/html/SSLGet-Usage.html

POST http://cats.bos.redhat.com:9180/ca/ee/ca/profileSubmit

profileId=caServerCert&cert_request_type=pkcs10&requestor_name=TPS-server.example.com-7889&cert_request=MIIBGTCBxAIBADBfMSgwJgYDVQQKEx8yMDA2MTEwNngxMiBTZmJheSBSZWRoYXQgRG9tYWluMRIwEAYDVQQLEwlyaHBraS10cHMxHzAdBgNVBAMTFndhdGVyLnNmYmF5LnJlZGhhdC5jb20wXDANBgkqhkiG9w0BAQEFAANLADBIAkEAsMcYjKD2cDJOeKjhuAiyaC0YVh8hUzfcrf7ZJlVyROQx1pQrHiHmBQbcCdQxNzYK7rxWiR62BPDR4dHtQzj8RwIDAQABoAAwDQYJKoZIhvcNAQEEBQADQQAKpuTYGP%2BI1k50tjn6enPV6j%2B2lFFjrYNwlYWBe4qYhm3WoA0tIuplNLpzP0vw6ttIMZkpE8rcfAeMG10doUpp&xmlOutput=true&sessionID=-4771521138734965266&auth_hostname=cats.bos.redhat.com&auth_port=9180

Returns "<?xml version="1.0" encoding="UTF-8"?><XMLResponse><Status>2</Status><Error>Request Deferred - defer request</Error><RequestId>  21</RequestId></XMLResponse>"

Dig the request ID out of the XML.

GET http://cats.bos.redhat.com:9180/ca/ee/ca/checkRequest?requestId=21

You'll get some horrific code with javascript mixed in.
snippet:
<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
header.status = "pending";
header.updatedOn = "1271975644";
header.requestId = "21";
header.authority = "ca";
header.createdOn = "1271975644";
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

Check header.status (UGH!).  "pending";"complete"
snippet 2:

<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
header.status = "complete";
header.updatedOn = "1271976823";
header.requestId = "21";
header.authority = "ca";
header.createdOn = "1271975644";
var recordCount = 0;
var record;
record = new Object;
record.HTTP_PARAMS = new Array;
record.HTTP_HEADERS = new Array;
record.AUTH_TOKEN = new Array;
record.SERVER_ATTRS = new Array;
record.serialNumber="14";
recordSet[recordCount++] = record;
record.recordSet = recordSet;
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
header.status = "rejected";
header.updatedOn = "1271977112";
header.requestId = "20";
header.authority = "ca";
header.createdOn = "1271975631";
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
header.requestNotes = "Blah update.";
header.status = "pending";
header.updatedOn = "1271977206";
header.requestId = "22";
header.authority = "ca";
header.createdOn = "1271977180";
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
header.status = "canceled";
header.updatedOn = "1271977289";
header.requestId = "23";
header.authority = "ca";
header.createdOn = "1271977186";
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
header.status = "rejected";
header.updatedOn = "1271977112";
header.requestId = "20";
header.authority = "ca";
header.createdOn = "1271975631";
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
header.status = "pending";
header.updatedOn = "1271977266";
header.requestId = "24";
header.authority = "ca";
header.createdOn = "1271977247";
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
fixed.authorityName = "Certificate Manager";
fixed.unexpectedError = "Request ID 25 was not found in the request queue.";
fixed.requestStatus = "2";
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

GET http://cats.bos.redhat.com:9180/ca/ee/ca/displayBySerial?serialNumber=0x14

<SCRIPT LANGUAGE="JavaScript">
var header = new Object();
var fixed = new Object();
var recordSet = new Array;
var result = new Object();
var httpParamsCount = 0;
var httpHeadersCount = 0;
var authTokenCount = 0;
var serverAttrsCount = 0;
header.HTTP_PARAMS = new Array;
header.HTTP_HEADERS = new Array;
header.AUTH_TOKEN = new Array;
header.SERVER_ATTRS = new Array;
header.certChainBase64 = "MIIC8jCCAdqgAwIBAgIBFDANBgkqhkiG9w0BAQsFADBHMSUwIwYDVQQKExxSZWQg\r\nSGF0IFdlc3Rmb3JkIERvbWFpbiBYVklJMR4wHAYDVQQDExVDZXJ0aWZpY2F0ZSBB\r\ndXRob3JpdHkwHhcNMTAwNDIyMjIzNDA0WhcNMTIwNDExMTk0ODI2WjBfMSgwJgYD\r\nVQQKEx8yMDA2MTEwNngxMiBTZmJheSBSZWRoYXQgRG9tYWluMRIwEAYDVQQLEwly\r\naHBraS10cHMxHzAdBgNVBAMTFndhdGVyLnNmYmF5LnJlZGhhdC5jb20wXDANBgkq\r\nhkiG9w0BAQEFAANLADBIAkEAsMcYjKD2cDJOeKjhuAiyaC0YVh8hUzfcrf7ZJlVy\r\nROQx1pQrHiHmBQbcCdQxNzYK7rxWiR62BPDR4dHtQzj8RwIDAQABo4GYMIGVMB8G\r\nA1UdIwQYMBaAFMIzoRNmqRgFbme8KperoucKRbhGMEMGCCsGAQUFBwEBBDcwNTAz\r\nBggrBgEFBQcwAYYnaHR0cDovL2NhdHMuYm9zLnJlZGhhdC5jb206OTE4MC9jYS9v\r\nY3NwMA4GA1UdDwEB/wQEAwIE8DAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUH\r\nAwIwDQYJKoZIhvcNAQELBQADggEBAG1tDjEy0EZzFoet1j2dTtmlNpkqiSKrI3Yg\r\nxNGTy8qKOKP9gIbsIJgtvYIoQlHcXXXPrskqa4WqfQtb9ItZcvNQ1Hw4sMcUGlDb\r\ncR5wgL6TgUf3sK2B9J8pNtzA97kFxAUKOUVjkxa2R7pw6U9mfJgS+08C5EabRmTS\r\nShaJ5md6dbiXXldoAk7uX640U4rxGodj+JwyNniiT9pXPFrk3PT+g1z6dXJmFsro\r\n3Sud6KlGwuWyzFXIrhkkMsMSyUlZtxZgP913af7BA3jBx7kSmam1byc4nmvWVFjY\r\nWz1Dakid3wSTtK4bXYkmV75o0E8qrm49j6dfH3FjiP956VQEGjw=";
header.certFingerprint = "MD2:\n        CC:8A:EB:45:EB:06:F0:21:A5:0D:2D:91:B5:F3:86:B8\nMD5:\n        55:D7:BD:06:07:D8:88:6B:8A:33:14:04:3E:5D:3E:C7\nSHA1:\n        47:20:07:A7:45:6A:31:D8:E9:54:34:57:4D:B3:78:1B:\n        50:98:D7:0D\nSHA256:\n        02:C3:83:ED:5A:CD:76:22:06:8F:A1:82:1F:5A:66:85:\n        FC:DA:03:AF:77:B0:92:B1:B4:55:25:47:0A:9A:C6:25\nSHA512:\n        D4:8C:1A:22:16:78:81:40:E5:25:8B:6B:2E:8C:7B:60:\n        A2:BE:57:51:8A:B0:26:3A:08:D3:26:58:81:78:7A:94:\n        D9:19:5A:F7:0C:E1:73:0B:C3:AD:F2:60:A5:D2:6E:67:\n        6D:97:7F:69:FA:74:D7:65:AF:F2:7B:9E:73:5E:07:DD\n";
header.authorityid = "ca";
header.pkcs7ChainBase64 = "MIIG3AYJKoZIhvcNAQcCoIIGzTCCBskCAQExADAPBgkqhkiG9w0BBwGgAgQAoIIG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\r\nMr21uA94+jitZR2SdPrBK4pDWQKRNKFCl6BttiAjMQA=";
header.serialNumber = "14";
header.emailCert = true;
header.noCertImport = true;
header.certPrettyPrint = "    Certificate: \n        Data: \n            Version:  v3\n            Serial Number: 0x14\n            Signature Algorithm: SHA256withRSA - 1.2.840.113549.1.1.11\n            Issuer: CN=Certificate Authority,O=Red Hat Westford Domain XVII\n            Validity: \n                Not Before: Thursday, April 22, 2010 6:34:04 PM EDT US/Eastern\n                Not  After: Wednesday, April 11, 2012 3:48:26 PM EDT US/Eastern\n            Subject: CN=water.sfbay.redhat.com,OU=rhpki-tps,O=20061106x12 Sfbay Redhat Domain\n            Subject Public Key Info: \n                Algorithm: RSA - 1.2.840.113549.1.1.1\n                Public Key: \n                    Exponent: 65537\n                    Public Key Modulus: (512 bits) :\n                        B0:C7:18:8C:A0:F6:70:32:4E:78:A8:E1:B8:08:B2:68:\n                        2D:18:56:1F:21:53:37:DC:AD:FE:D9:26:55:72:44:E4:\n                        31:D6:94:2B:1E:21:E6:05:06:DC:09:D4:31:37:36:0A:\n                        EE:BC:56:89:1E:B6:04:F0:D1:E1:D1:ED:43:38:FC:47\n            Extensions: \n                Identifier: Authority Key Identifier - 2.5.29.35\n                    Critical: no \n                    Key Identifier: \n                        C2:33:A1:13:66:A9:18:05:6E:67:BC:2A:97:AB:A2:E7:\n                        0A:45:B8:46\n                Identifier: Authority Info Access: - 1.3.6.1.5.5.7.1.1\n                    Critical: no \n                    Access Description: \n                        Method #0: ocsp\n                        Location #0: URIName: http://cats.bos.redhat.com:9180/ca/ocsp\n                Identifier: Key Usage: - 2.5.29.15\n                    Critical: yes \n                    Key Usage: \n                        Digital Signature \n                        Non Repudiation \n                        Key Encipherment \n                        Data Encipherment \n                Identifier: Extended Key Usage: - 2.5.29.37\n                    Critical: no \n                    Extended Key Usage: \n                        1.3.6.1.5.5.7.3.1\n                        1.3.6.1.5.5.7.3.2\n        Signature: \n            Algorithm: SHA256withRSA - 1.2.840.113549.1.1.11\n            Signature: \n                6D:6D:0E:31:32:D0:46:73:16:87:AD:D6:3D:9D:4E:D9:\n                A5:36:99:2A:89:22:AB:23:76:20:C4:D1:93:CB:CA:8A:\n                38:A3:FD:80:86:EC:20:98:2D:BD:82:28:42:51:DC:5D:\n                75:CF:AE:C9:2A:6B:85:AA:7D:0B:5B:F4:8B:59:72:F3:\n                50:D4:7C:38:B0:C7:14:1A:50:DB:71:1E:70:80:BE:93:\n                81:47:F7:B0:AD:81:F4:9F:29:36:DC:C0:F7:B9:05:C4:\n                05:0A:39:45:63:93:16:B6:47:BA:70:E9:4F:66:7C:98:\n                12:FB:4F:02:E4:46:9B:46:64:D2:4A:16:89:E6:67:7A:\n                75:B8:97:5E:57:68:02:4E:EE:5F:AE:34:53:8A:F1:1A:\n                87:63:F8:9C:32:36:78:A2:4F:DA:57:3C:5A:E4:DC:F4:\n                FE:83:5C:FA:75:72:66:16:CA:E8:DD:2B:9D:E8:A9:46:\n                C2:E5:B2:CC:55:C8:AE:19:24:32:C3:12:C9:49:59:B7:\n                16:60:3F:DD:77:69:FE:C1:03:78:C1:C7:B9:12:99:A9:\n                B5:6F:27:38:9E:6B:D6:54:58:D8:5B:3D:43:6A:48:9D:\n                DF:04:93:B4:AE:1B:5D:89:26:57:BE:68:D0:4F:2A:AE:\n                6E:3D:8F:A7:5F:1F:71:63:88:FF:79:E9:54:04:1A:3C\n        FingerPrint\n            MD2:\n                CC:8A:EB:45:EB:06:F0:21:A5:0D:2D:91:B5:F3:86:B8\n            MD5:\n                55:D7:BD:06:07:D8:88:6B:8A:33:14:04:3E:5D:3E:C7\n            SHA1:\n                47:20:07:A7:45:6A:31:D8:E9:54:34:57:4D:B3:78:1B:\n                50:98:D7:0D\n            SHA256:\n                02:C3:83:ED:5A:CD:76:22:06:8F:A1:82:1F:5A:66:85:\n                FC:DA:03:AF:77:B0:92:B1:B4:55:25:47:0A:9A:C6:25\n            SHA512:\n                D4:8C:1A:22:16:78:81:40:E5:25:8B:6B:2E:8C:7B:60:\n                A2:BE:57:51:8A:B0:26:3A:08:D3:26:58:81:78:7A:94:\n                D9:19:5A:F7:0C:E1:73:0B:C3:AD:F2:60:A5:D2:6E:67:\n                6D:97:7F:69:FA:74:D7:65:AF:F2:7B:9E:73:5E:07:DD\n";
result.header = header;
result.fixed = fixed;
result.recordSet = recordSet;
</SCRIPT>

As of 7.3, all of profileSubmit, checkRequest, and displayBySerial should
support XML output of some kind, but it's not until 8.0 that checkRequest
gives us the serial number of the issued cert when it tells us that our
request succeeded, so if the goal is to avoid scraping Javascript, we have
to require 8.0.