What are the correct arguments to git-svnimport?

I was trying to test the git-svnimport script but I've been unable to
get it to run. The docs really aren't very clear about the correct
values of <SVN_repository_URL> and <path>, so maybe I've gotten them
wrong.  Or maybe it just doesn't work.

I get tons of 'Unrecognized path: /project/trunk/...'

and I've tried various combinations of SVN_repository_URL and path:

SVN_repository_URL:
    http://svn.myhost.com/repo
    http://svn.myhost.com/repo/
    http://svn.myhost.com/repo/project
    http://svn.myhost.com/repo/project/
    http://svn.myhost.com/repo/project/trunk
    http://svn.myhost.com/repo/project/branches/mybranch

and <path>:
    *nothing*
    project
    project/trunk
    project/branches/mybranch
    http://svn.myhost.com/repo/project
    ...etc...

Can someone who actually uses svn-import send me the command-line they
use? Thanks.

-chris