synchronize between your git and svn repository

'git svn' is good to help on this,
if you don't have a git repository yet, you could get a cloned git
repository right from your svn repository by running this following command

git svn clone [YOUR-SVN-REPOSITORY-URL]

if you've got a git repository in hand, just try

git svn init [YOUR-SVN-REPOSITORY-URL]

this may help you set the 'svn-remote' of your git repository

after any of above two steps, you could simply use these commands to
synchronize between your git and svn repository:

git svn fetch
git svn rebase
git svn dcommit