ci: fetch PR refs before scoped pre-commit

Made-with: Cursor

Author: yinkscss

.github/workflows/pre-commit.yml

@@ -32,6 +32,7 @@ jobs:
       - name: Run pre-commit
         run: |
           if [[ "${{ github.event_name }}" == "pull_request" ]]; then
+            git fetch --no-tags origin "${{ github.event.pull_request.base.sha }}" "${{ github.event.pull_request.head.sha }}"
             pre-commit run --from-ref "${{ github.event.pull_request.base.sha }}" --to-ref "${{ github.event.pull_request.head.sha }}" --show-diff-on-failure
           else
             pre-commit run --all-files --show-diff-on-failure