--- Mk/bsd.sites.mk	(revision 403379)
+++ Mk/bsd.sites.mk	(working copy)
@@ -519,6 +519,7 @@ 
 #                 Using the name of a branch here is incorrect. It is
 #                 possible to do GH_TAGNAME= GIT_HASH to do a snapshot.
 #                 default: ${DISTVERSION}
+# GH_TUPLE      - above shortened to account:project:tagname[:group]
 #
 .if defined(USE_GITHUB)
 .  if defined(GH_TAGNAME) && ${GH_TAGNAME} == master
@@ -526,6 +527,27 @@ 
 		Must use a tag or commit hash so the upstream does \
 		not "reroll" as soon as the branch is updated
 .  endif
+.  if defined(GH_TUPLE)
+GH_ACCOUNT+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?).*@\1\4@}
+GH_PROJECT+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?).*@\2\4@}
+GH_TAGNAME+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?).*@\3\4@}
+
+_GIT_REV_GET=	${GH_TUPLE:@TUPLE@GIT_REV_${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\4@:C@:@@:C@-@_@g}=`git ls-remote https://github.com/${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\1@}/${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\2@}.git | ${GREP} HEAD | ${SED} -E "s/^(.......).*/\\1/g"` && @}
+_GIT_REV_ECHO=	${GH_TUPLE:@TUPLE@echo "GH_TUPLE+=	${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\1:\2:\${GIT_REV_${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\4@:C@:@@:C@-@_@g}}\4@}" && @}
+_GIT_REV_CHANGE=${GH_TUPLE:@TUPLE@if [ ${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\3@} != "\$$GIT_REV_${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\4@:C@:@@:C@-@_@g}" ]; then echo "GH_TUPLE+=	${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\1:\2:\${GIT_REV_${TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\4@:C@:@@:C@-@_@g}}\4@}"; fi && @}
+
+gh-get-latest-revisions:
+	@${ECHO} "--begin latest revisions--" && \
+		${_GIT_REV_GET} \
+		${_GIT_REV_ECHO} \
+	${ECHO} "--end latest revisions--"
+
+gh-get-changed-revisions:
+	@${ECHO} "--begin changed revisions--" && \
+		${_GIT_REV_GET} \
+		${_GIT_REV_CHANGE} \
+	${ECHO} "--end changed revisions--"
+.  endif
 # We are cheating and using backend URLS for Github here. See ports/194898
 # comment #15 for explanation as to why and how to deal with it if it breaks.
 MASTER_SITE_GITHUB+=		https://codeload.github.com/%SUBDIR%