When recreating a polecat worktree, the branch deletion might fail
silently, leaving a stale branch with old commits. The worktree would
then be created from this stale branch, missing recent main changes.
Fix:
- Add ResetBranch() method to git package for force-updating branches
- Fetch from origin before recreation to ensure fresh commits
- If branch deletion fails, force-reset the branch to origin/main
- This ensures polecats always start with the latest code
Discovered during gt-8tmz swarm when nux polecat was missing the
internal/formula/ directory that was added after its branch diverged.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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