Backport of "git-update: Use --force when checking out manifest" into 1.16
Backport of !162 (merged) "git-update: Use --force when checking out manifest".
Commits:
- 4d60e89a git-update: Use --force when checking out manifest
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Backport of !162 (merged) "git-update: Use --force when checking out manifest".
Commits: