Follow-up of this so-question: if I have a shallow clone, how to fetch all older commits to make it a full clone?
The below command (git version 1.8.3) will convert the shallow clone to regular one
git fetch --unshallow
Then, to get access to all the branches on origin (thanks @Peter in the comments)
git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*" git fetch origin