git-svn(1): update instructions for resuming a git-svn clone
git-svn(1): update instructions for resuming a git-svn clone

git-svn expects its references under refs/remotes/*; but these will
not be copied or set by "git clone"; put in this man page the manual
fiddling that is required with current git-svn to get this to work.

Signed-off-by: Sam Vilain <9e3d9c151a1935fa51df4c7420358e0667b0b28d@catalyst.net.nz>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git