Personally I had performed a backup of my dir /.git/ and zipei.
But I had problems in this file, I managed to unpack with errors. I would like to know if you have a command to FORCE to try to recover as much of this /.git/ files as possible
First, make a folder to re-create a repository:
mkdir repo
mv .git repo
cd repo
Then delete empty (corupt) files
find .git -size 0 -delete
Try a file system check:
git fsck
If you have another deposit, use it to rebuild what's missing:
git remote add origin url
git fetch origin