git -> svn branch

svn mkdir branches/mybranch
svn commit -m "Create mybranch"

git svn clone http://myrepo.org/proj/branches/mybranch
cd mybranch
git remote add mygit /path/to/my/git/repo
git fetch mygit
# поскольку коммитов было немного:
git cherry-pick mygit~4
# ...
git cherry-pick mygit

git svn dcommit

git checkout -b mygit -t mygit/master
git rebase master
git checkout master
git merge mygit