Index: bsd.sites.mk
===================================================================
--- bsd.sites.mk	(revision 310475)
+++ bsd.sites.mk	(working copy)
@@ -527,9 +527,13 @@
 MASTER_SITES+=	GH GHC
 .endif
 GH_PROJECT?=	${PORTNAME}
+.if defined(GH_COMMIT)
+GH_TAGNAME?=	${GH_COMMIT}
+.else
 GH_TAGNAME?=	${DISTVERSION}
 .endif
 .endif
+.endif
 
 .if !defined(IGNORE_MASTER_SITE_GNOME)
 MASTER_SITE_GNOME+= \