Review feedback on PR #2460: the previous "do not write to refs, HEAD,
or remotes" wording contradicted the explicit allowance of `git fetch`
(which updates remote-tracking refs) and the mandatory cross-repo
checks in Step 6, which `cd` into `_repos/<repo>` and run
`git checkout`, `git pull`, etc.
Sharpen the scope paragraph:
- The git-write ban is now explicitly scoped to the cozystack working
tree — it bans writing to local branches, tags, or HEAD in that
repo, not "refs/HEAD/remotes" globally.
- `git fetch` is called out as expected.
- Local git operations inside disposable `_repos/` clones
(`git checkout`, `git pull`, etc.) are explicitly allowed, with
the remaining rules (no push, no PR creation, no API writes)
applying to any repository.
Signed-off-by: Myasnikov Daniil <myasnikovdaniil2001@gmail.com>
3c95f30521