A developer moved a local branch reference and can no longer see a recent commit in ordin…

A developer moved a local branch reference and can no longer see a recent commit in ordinary log output. What is the narrowest first recovery step?

1. Inspect `git reflog`, verify the old object, and create a recovery reference to it.
2. Run garbage collection immediately so unreachable objects are easier to find.
3. Rebase every shared branch onto the missing commit hash.