Description: Cannot use system date as a datestamp if builds are to be reproducible.
Author: Peter Blackman <peter@pblackman.plus.com>
Forwarded: https://github.com/johnsonjh/duma/issues/206

Index: b/make_git_source_version.sh
===================================================================
--- a/make_git_source_version.sh
+++ b/make_git_source_version.sh
@@ -54,7 +54,7 @@
 
 get_utc_date()
 {
-	UTC_DATE=$(TZ=UTC date -u "+%D %T" 2> /dev/null)
+	UTC_DATE=$(TZ=UTC __DATE__ -u "+%D %T" 2> /dev/null)
 	# shellcheck disable=SC2236
 	if [ -n "${UTC_DATE}" ] && [ ! -z "${UTC_DATE}" ]; then
 		UTC_DATE_INFO=", ${RELENG} ${UTC_DATE}"