1. fetch
2. clone
3. 更新上游到本地:
git remote add upstream https://github.com/kingkeivn/coding2017
#同步上游代码
git fetch upstream
git merge upstream/master
#推到你的远端仓库
git push origin master
git fetch upstream
git merge upstream/master
#推到你的远端仓库
git push origin master
4. 提交代码
git add .
git commit -m 'you message here'
git push origin master