`cloneIfRequired` only ran the underlying clone executor when the target directory was missing, so a reusable workflow referenced by a moving ref (`uses: org/repo/.gitea/workflows/wf.yml@master`) was cached forever after the first invocation — edits to the source file never propagated.
Always invoke `git.NewGitCloneExecutor`. It handles existing repositories via fetch + pull + hard-reset, so branch and tag refs are brought up to date on each run, matching GitHub Actions semantics.
Drops the global `executorLock` too: `NewGitCloneExecutor` already takes a per-directory lock via `acquireCloneLock`, so the outer mutex only added unnecessary serialization across unrelated reusable-workflow clones — worse now that every invocation runs the full fetch.
Includes a regression test that drives the wrapper against a local bare repo, pushes a new commit on `master` between two invocations, and asserts the cached workflow file reflects the new tip.
Fixes: https://github.com/go-gitea/gitea/issues/37483
Fixes: https://gitea.com/gitea/runner/issues/726
Related: https://github.com/go-gitea/gitea/issues/30543
Would be subsumed by https://gitea.com/gitea/runner/pulls/814 ("WIP: Introduce new action cache") once that lands.
---
This PR was written with the help of Claude Opus 4.7
Reviewed-on: https://gitea.com/gitea/runner/pulls/930
Reviewed-by: Zettat123 <39446+zettat123@noreply.gitea.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-committed-by: silverwind <me@silverwind.io>
