Whilst doing git svn clone -s https://svn.example.com/repo/ I received the following output:
r3073 = a6132f3a937b632015e66d694250da9f606b8333 (r
You may use git-svn server-side alternative, SubGit in order to avoid many of git-svn translation problems.
I'm a SubGit developer and could say that we worked a lot to resolve character translation issues like the one above; in this particular case tag would be translated to a refs/tags/Sync+Controllers tag.
Note also, that git-svn has translated Subversion tag as a branch instead of a tag.