I migrated an svn repository's trunk to git. I then made some commits to the git repo. 
I am now migrating an old svn branch to the new git repo. 
To do this I added svn-remote.url and svn-remote.fetch config to .git/config. When I now do git svn fetch and subsequently checkout using git svn checkout I get detached tree in SourceTree:

The right most purple branch is as if its without a root, whereas it should branch off just where the other branch is branching from.
 
    