Update dbip_download.yml

Author: czarte

.github/workflows/dbip_download.yml

@@ -49,7 +49,7 @@ jobs:
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
           git fetch
-          BRANCH=$(git ls-remote --heads 2>/dev/null | grep generated-source)
+          BRANCH="$(git ls-remote --exit-code --heads origin generated-source 2>/dev/null || true)"
           if [[ "$BRANCH" == "" ]]
           then
                git checkout -B generated-source