JAMES-2559 Explicitly specify SHA1 belongs to origin
diff --git a/dockerfiles/merge/merge.sh b/dockerfiles/merge/merge.sh
index a589cb9..25e063d 100755
--- a/dockerfiles/merge/merge.sh
+++ b/dockerfiles/merge/merge.sh
@@ -31,6 +31,8 @@
 
 # Getting the branch to be merged from /origin
 git fetch origin
+# This is required for non master branches but fails for SHA-1
+git checkout origin/$SHA1 -b $SHA1 || true
 git checkout $SHA1
 git checkout -b SHA1_BRANCH