Clone Repository refs error

Hi,

When we clone our repository we get a refs error.

coins@VM-ukazux01:/u/git$ git clone git@bitbucket.org:coinsoa/coins.git /u/git/coinsrelease2 Cloning into '/u/git/coinsrelease2'...
error: refs/heads/v11.08/olekri/d17756a_missing_timecard_rep does not point to a valid object!
remote: Counting objects: 565083, done.
remote: Compressing objects: 100% (123898/123898), done.
Receiving objects: 100% (565083/565083), 453.15 MiB | 18.24 MiB/s, done.
remote: Total 565083 (delta 440613), reused 565041 (delta 440597)
Resolving deltas: 100% (440613/440613), done.
Checking out files: 67% (162413/242406)

This also happens on pull.

coins@VM-ukazux01:/u/git/coinsrelease2$ git pull
error: refs/heads/v11.08/olekri/d17756a_missing_timecard_rep does not point to a valid object!
remote: error: refs/heads/v11.08/olekri/d17756a_missing_timecard_rep does not point to a valid object!

When we visit out commits and branches pages on BitBucket, it displays the 'Something went wrong' page.

Yesterday our repo's size was reduced and a lot of garbage was deleted (BBS-78384), not sure if this has caused the issue.

Thanks.