How do I rename both a Git local and remote branch name?

 If you have named a branch incorrectly AND pushed this to the remote repository follow these steps to rename that branch (based on this article):

1. Rename your local branch:

   • If you are on the branch you want to rename:
     git branch -m new-name

   • If you are on a different branch:
     git branch -m old-name new-name

2. Delete the old-name remote branch and push the new-name local branch:
   git push origin :old-name new-name

3. Reset the upstream branch for the new-name local branch:
   Switch to the branch and then:
   git push origin -u new-name

from : https://stackoverflow.com/questions/30590083/how-do-i-rename-both-a-git-local-and-remote-branch-name