Multiple branches and git-svn

After having had several embarrassing occurences with git-svn dcommit, I think it would not be amiss to mention in the docs just how git-svn happens to figure out which Subversion remote it is associated with.

One surprising relevation was that this association changed after a git-rebase.

It may be a general git thing, or it may be git-svn specific, but it was not exactly what I expected. And the docs were not really that helpful.

In particular, man git-svn is completely silent about this.