Git "bad sha1 file" error

Question

Hello I have the following error by git-fsck, which cannot be cleaned by git-gc even in --aggressive mode. What can I do next to fix this repository error?

$ git-fsck
bad sha1 file: .git/objects/55/tmp_obj_a07724

Answer 1

It's not a simple answer, sadly. But this might help:

Recovering from repository corruption (from the Git's user manual).

Answer 2

Err... tmp_obj_a07724 suspiciously looks like a leftover temporary file :)

What happens if you simply move it away from the .git directory (after a backup of the whole thing)?