diff --git a/diff-sha.sh b/diff-sha.sh
index d8ef6d6b..cd31e541 100644
--- a/diff-sha.sh
+++ b/diff-sha.sh
@@ -224,7 +224,7 @@ else
           echo "Fetching $i commits..."
 
           # shellcheck disable=SC2086
-          git fetch $EXTRA_ARGS -u --progress --deepen="$i" origin "$CURRENT_BRANCH"
+          git fetch $EXTRA_ARGS -u --progress --deepen="$i" origin +"$GITHUB_REF":refs/remotes/origin/"$CURRENT_BRANCH"
 
           if git diff --name-only --ignore-submodules=all "$PREVIOUS_SHA$DIFF$CURRENT_SHA" 1>/dev/null 2>&1; then
             break