git fetch upstream failed

[shonge]

Bug Report

What did you do?

$ git remote set-url --push upstream no_push  
$ git remote -v  
$ git fetch upstream  
$ git checkout master 

What did you expect to see?
git fetch upstream

upstream        https://github.com/pingcap/tidb-operator (fetch)
upstream        no_push (push)

remote: Enumerating objects: 116, done.
remote: Counting objects: 100% (116/116), done.
remote: Compressing objects: 100% (20/20), done.
remote: Total 171 (delta 95), reused 112 (delta 93), pack-reused 55
Receiving objects: 100% (171/171), 88.77 KiB | 315.00 KiB/s, done.
Resolving deltas: 100% (101/101), completed with 60 local objects.
From https://github.com/pingcap/tidb-operator
 * [new branch]        branch-1    -> upstream/branch-1
 * [new branch]        create-statefulset-immediately -> upstream/create-statefulset-immediately
 * [new branch]        master      -> upstream/master
 * [new branch]        release-1.0 -> upstream/release-1.0
 * [new tag]           v1.0.0-rc.1 -> v1.0.0-rc.1

What did you see instead?

upstream        [email protected]:pingcap/tidb-operator.git (fetch)
upstream        no_push (push)

Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

[weekface]

fixed by #690