corrupted Git repository

From: Kasra Khosoussi <kasra.mail@gmail.com>
Date: Jun 21, 2011, 06:58 UTC
Message-ID: <BANLkTi=A=DpyfNwEeSd6N6ibCsA5qh_NPQ@mail.gmail.com>

Hi all,

My thesis repository is corrupted and I don't have any recent backup (my files are OK, but the history is lost). I've seen the recovery examples in the manual, but I believe my case is somehow different. The repository is linear.

1- At the beginning, git status/log/fsck -full said:

> fatal: object 0a83757505387aacc2fd36b3c996729e6bf9d6e5 is corrupted

and there was an empty file in .git/objects/01/8375... .

2- If I move the corrupted object, git fsck --ful would return this:

> error: HEAD: invalid sha1 pointer 0a83757505387aacc2fd36b3c996729e6bf9d6e5
> error: refs/heads/master does not point to a valid object!
> dangling tree 06f388dc60cfb014b5e1f70ecdaa568efe6bd0fa
> dangling tree d86f8c75e836e13b6e0336361641223f48fde722

3- I guess I have to edit refs/heads/master and replace the corrupted sha1 with another hash, but I'm not sure how I can find the proper commit (e.g.,maybe by using find -mtime?).

Thanks in advance,

-Kasra