diff --git a/Makefile b/Makefile
index dc24469..9e5497c 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,9 @@ NAME=lorax-templates-rhel
 RHELVER=10.0
 RHPKG=centpkg --release=c10s
 
+# Previous release, override this when new commits are already on c10s
+PREV ?= origin/c10s
+
 # git user.email and user.name must be setup
 GITEMAIL := $(shell git config user.email)
 GITNAME := $(shell git config user.name)
@@ -34,7 +37,7 @@ update-spec: clog
 
 clog:
 	@echo "* $(shell date '+%a %b %d %Y') ${GITNAME} <${GITEMAIL}> - ${RHELVER}-${SERIAL}" > clog-spec
-	./tools/git-changelog -t origin/c10s > clog
+	./tools/git-changelog -t ${PREV} > clog
 	cat clog >> clog-spec
 
 # These need to rerun make to pick up the bumped serial number