记录下提交过程，易忘供查询用。内容源自田总的分享。
1）在github上fork一份最新的master代码
2）用社区代码库创建本地仓库
git clone https://github.com/apache/spark test-spark
3）加入自己的github代码库
cd test-spark
git remote -v #列出已经存在的分支
origin https://github.com/apache/spark (fetch)
origin https://github.com/apache/spark (push) git remote add roger https://github.com/luogankun/spark #在url创建名字为roger的仓库
git remote -v
origin https://luogankun@github.com/luogankun/spark.git (fetch)
origin https://luogankun@github.com/luogankun/spark.git (push)
roger https://github.com/luogankun/spark (fetch)
roger https://github.com/luogankun/spark (push)
4）下载自己的github代码库
git fetch luogankun
报错：error: The requested URL returned error: 403 Forbidden while accessing https://github.com/luogankun/spark/info/refs
添加代理：git config --global http.proxy http://ip:port
5）创建新的分支并且切换到新分支上
git checkout -b spark-8888 origin/master
git branch #显示当前所在的分支，以及目前本地所有分支,前面有*标注的是当前所在分支
git branch -a #显示当前所在的分支，以及目前远程所有分支,前面有*标注的是当前所在分支
6）修改代码
...
7）本地提交
git status
git add .......
git commit –m "github spark test"
8）提交到远程
git push luogankun spark-8888
9）创建issue和PR