Github Repo Corruption - Sha1 Collision

Question

Yesterday one of my team\'s checkins corrupted our github repo. On github, they were showing this error:

$ git fsck
error: sha1 mismatch 87859f196ec9266bada         


        

Answer 1

I ran into the same issue and ran:

git prune  
git gc  

which mentioned

error: bad ref for refs/remotes/origin/ticketName

so I removed the reference and that fixed the issue:

rm .git/refs/remotes/origin/ticketName