git svn rebase --> "file.abs: needs update"
git stash (save local changes away)
git stash list (have a look at what is stashed)
git svn rebase
git svn dcommit
git stash apply (back to where we were before)
Alternatively, use a branch for local changes and merge them into the master. This way the master only contains files that are going back to the SVN trunk.