diff --git a/mirror.sh b/mirror.sh
index 9db5614..d348c72 100755
--- a/mirror.sh
+++ b/mirror.sh
@@ -11,4 +11,4 @@ set -x
 git init -b "$GITHUB_REF_NAME"
 git remote add origin "$URL"
 git fetch --no-tags --prune --no-recurse-submodules origin "$GITHUB_SHA"
-git push "$INPUT_URL" "$GITHUB_REF_NAME:$GITHUB_REF"
+git push "$INPUT_URL" "$GITHUB_SHA:$GITHUB_REF"