# Rename the local branch to the new name
git branch -m <old_name> <new_name>
# Delete the old branch on remote - where <remote> is, for example, origin
git push <remote> --delete <old_name>
# Or shorter way to delete remote branch [:]
git push <remote> :<old_name>
# Push the new branch to remote
git push <remote> <new_name>
# Reset the upstream branch for the new_name local branch
git push <remote> -u <new_name>