fix(server): a branch on the only remote is not a fork when there is no origin (#20412)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2c8f3a0cfcVictor Vogel committed on 10/18/2026, 7:23:18 PM· committed by GitHubparentfc86c68
2 files changedLine totals unavailable