Phase 2 of Heresy Correction: Local-Only Polecat Branches
Changes:
- Replace FetchBranch("origin", branch) with BranchExists() check
- Use local branch directly for CheckConflicts() and MergeNoFF()
- Remove "origin/" prefix from branch references
The Refinery worktree shares .repo.git with polecat worktrees, so
branches created by polecats are already visible locally without
needing to fetch from origin.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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