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DanConwayDev f25eea8cc3 fix: fetch full git history instead of shallow clones
Previously, purgatory sync was using '--depth=1' when fetching OIDs from
remote servers. This created shallow clones with only 1-2 commits instead
of the complete git history.

The fix removes the '--depth=1' flag, allowing git to fetch the complete
commit history chain when fetching specific commit OIDs. This is the
correct behavior for GRASP - users cloning from our relay should get the
full repository history.

Changes:
- Remove '--depth=1' from git fetch command in RealSyncContext::fetch_oids
- Update comment to clarify that full history is fetched

Impact:
- Production repositories will now contain full git history
- Users cloning from the relay will get complete commit chains
- No more 'shallow' files in git repositories
- May be slightly slower due to fetching more data, but correctness is prioritized

Testing:
- All 564 tests pass (276 unit + 288 integration)
- No regressions in existing functionality

Fixes issue documented in work/active-issues/shallow-git-fetch.md
2026-01-12 10:57:50 +00:00
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