update

zhangyonghong · zhangyonghong · commit 7611bfda18db · 2015-09-02T17:16:14.000+08:00
diff --git a/qq.md b/qq.md
@@ -1013,6 +1013,7 @@ https://github.com/jsfront/qa/tree/master/2015/07/03
     - [git-for-windows](https://git-for-windows.github.io/)
     - [GitHub 添加 SSH keys](http://daemon369.github.io/git/2015/03/10/add-ssh-keys-for-github/)
     - [gogithub](http://www.worldhello.net/gotgithub/index.html)
+    - [git常规命令练习](http://pcottle.github.io/learnGitBranching/)
 
 2. Svn
 
