How to prefix existing svn remotes?

["Sébastien Mazy" <melyadon@gmail.com>]

Hi all,


I created a few months ago a git-svn repository using:
git svn clone -s https://my_svn_repo .

wich also created the following remotes:
git branch -r
  branch0
  tags/tag0
  trunk

I would like to prefix theses remotes, so that it shows:
git branch -r
  prefix/branch0
  prefix/tags/tag0
  prefix/trunk

Of course I should have used the -prefix back when creating the repo but
it's too late. 'git help svn' doesn't explain how to achieve that and
simply editing .git/config to add the missing prefix will cause the next
'git svn fetch' to download again the whole history (which in my case is
huge).


Is it possible? Did I miss something obvious?


Cheers,

-- 
Sébastien Mazy