The workflow needs -f flag to rebase and push on a branch

Author: openstack-k8s-ci-robot

.github/workflows/sync_branches_reusable_workflow.yml

@@ -37,4 +37,4 @@ jobs:
           git fetch origin ${{ inputs.source-branch }}
           git checkout ${{ inputs.target-branch }}
           git rebase ${{ inputs.source-branch }}
-          git push origin ${{ inputs.target-branch }}
+          git push --force origin ${{ inputs.target-branch }}