strange git pushエラー

Question

2番目のgit pushにエラーがありますが、同じプルリクエストにいくつかの新しい変更を加えたいだけですが、この問題を解決する方法はありますか？ありがとう。

Gitの操作

git checkout -b newFooBranch 
git add <name of file changed> 
git commit -m 'add some initial changes' 
git push origin newFooBranch 

// make some changes 
git add <name of same file changed> 
git commit -m 'add some new changes on the same file' 
// met with error when executing below command 
git push origin newFooBranch 

エラーメッセージ、

To git@github.com:foo/goo.git 
! [rejected]  newFooBranch -> newFooBranch (non-fast-forward) 

error: failed to push some refs to 'git@github.com:foo/goo.git' 
hint: Updates were rejected because the tip of your current branch is behind 
hint: its remote counterpart. Integrate the remote changes (e.g. 
hint: 'git pull ...') before pushing again. 
hint: See the 'Note about fast-forwards' in 'git push --help' for details. 

編集1、

git pull 
There is no tracking information for the current branch. 
Please specify which branch you want to merge with. 
See git-pull(1) for details. 

    git pull <remote> <branch> 

If you wish to set tracking information for this branch you can do so with: 

    git branch --set-upstream-to=origin/<branch> newFooBranch 

に関して、 林

Answer 1

のいずれかの操作を行います。

git pull

かを：

git remote update 
git rebase origin/newFooBranch 

をあなたの変更をプッシュする前に。