gistfile1.sh

$ git remote add joyent [email protected]:repo
fatal: remote joyent already exists.

$ git remote rm joyent
$ git remote add joyent [email protected]:repo
$ git push joyent master
To [email protected]:repo
 ! [rejected]        master -> master (non-fast-forward)
error: failed to push some refs to '[email protected]:repo'
To prevent you from losing history, non-fast-forward updates were rejected
Merge the remote changes before pushing again.  See the 'Note about
fast-forwards' section of 'git push --help' for details.

I solved it by deleting the old repo but force push works too :)