GIT is a tool to control source code version which have better function than SVN. For the best suggestion, I think the man git gives very good answers.
- 从GitHub上复制源代码 先搜索到你感兴趣的源代码,在最顶级的目录出就有选项,可以直接选择下载为zip压缩包,或者在本地复制一个同步的备份。如果你注册了GitHub账号,还可以选择fork,从而复制一份源代码到你的帐户目录下面。