Cannot do git pull origin (git-pack-objects died with error)

I tried to do a pull origin command and it's not working at all.

Error message from TortoiseGit is:
git.exe fetch -v --progress "origin"

error: git upload-pack: git-pack-objects died with error.
fatal: git upload-pack: aborting due to possible repository corruption on the remote side.
remote: error: Could not read 5685976d9fa8bf38025eb31d009ed14b0de955c3
remote: fatal: bad tree object 5685976d9fa8bf38025eb31d009ed14b0de955c3
remote: aborting due to possible repository corruption on the remote side.
fatal: protocol error: bad pack header

git did not exit cleanly (exit code 128) (4313 ms @ 4.4.2013 17:36:25)

I've read on the internet I should run git fsck but I'm not able to run it on bitbucket.

It's private repository here: https://bitbucket.org/webtec/zariadim/commits/all