1. sudo apt-get install git-svn (make sure you have the 'git svn' installed )
2. First you have to create a file that maps your Subversion commit author names to Git commiters, say ~/authors.txt:
jmaddox = Jon Maddox <jon@gmail.com bigpappa = Brian Biggs <bigpappa@gmail.com>
Then you can download the Subversion data into a Git repository:
mkdir repo && cd repo
git svn init http://subversion/repo --no-metadata
git config svn.authorsfile ~/authors.txt
git svn fetch
参考：(refer to:) http://stackoverflow.com/questions/79165/how-to-migrate-svn-with-history-to-a-new-git-repository