获取master：
git clone ssh://some.i.p/some/source/~/somerep
获取branch：
git clone -b branch-version ssh://some.i.p/some/source/~/somerep
master切换到branch
git fetch origin
git chechout -b version.number origin/version.number
原文：http://www.cnblogs.com/voctrals/p/4968299.html