导航分支
目的学习如何导航仓库的分支。现在在你的项目中具有两个分支:$ git hist --all$ git hist --all* 28917a4 2013-04-13 | Updated Rakefile (HEAD, greet) [Jim Weirich]* 4dac415 2013-04-13 | Hello uses Greeter [Jim Weirich]* 39347b3 2013-04-13 | Added greeter class [Jim Weirich]* 96ee164 2013-04-13 | Added a Rakefile.
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