zsh completion for `git push origin --delete`

From: Albert Netymk <albertnetymk@gmail.com>
Date: Jan 17, 2015, 11:18 UTC
Message-ID: <CAKEGsXTpzZQSHk-8x2kYEcaayLOpsLpU0J5pPne7CBGvTtXGkg@mail.gmail.com>

The man for `--delete` says only refs on the remote repo are affected. Then, the auto-completion in zsh shall not return local refs.

```
$ git branch -a
  master
* tmp
  remotes/origin/master
  remotes/origin/tmp

$ git push origin --delete <tab> FETCH_HEAD HEAD master ORIG_HEAD origin/master origin/tmp tmp ``` I feel hitting <tab> shall only return `master` and `tmp`, which are the valid input `--delete` option.

git version 2.2.2

-- 
Best Regards

Yours faithfully
Albert Netymk