https://rein.kr/posts/2009-06-08-git-svn-%EB%8F%99%EC%9E%91%EC%9D%B4-%EA%B1%B0%EC%A7%80%EA%B0%99%EA%B2%8C-%EB%8A%90%EA%BB%B4%EC%A7%80%EB%8D%98-%EC%9D%B4%EC%9C%A0/