How do you remove an invalid remote branch reference from Git?

Question

In my current repo I have the following output:

$ git branch -a
* master
  remotes/origin/master
  remotes/public/master

I want to delete <

Answer 1

git gc --prune=now is not what you want.

git remote prune public

or git remote prune origin # if thats the the remote source

is what you want