Can I switch a git-svn clone from a file => http url?

I've just created a git-svn clone from a svn repo accessed locally 
with a file:/// path.

Unfortunately the local svn repo is just a copy of the main svn repo 
normally accessed with http or https (served through Apache). I was 
having problems cloning the main svn repository (more details below) 
so I archived the remote svn repository and copied it to my local 
hard drive.

Is there an operation I can now do to switch the base url from:

   file:///Path/to/svn/repository/projects

to

   https://svn.concord.org/svn/projects

Here's more details about the problem that got me to this spot:

The svn repo is about 1GB.

I tried several times on a 1000baseT network to git-svn clone the 
repo. There are about 13000 revisions but the clone process would 
randomly stop without an error somewhere between revision 400 and 
1200.

This was the command I was using:

git svn clone https://svn.concord.org/svn/projects

I'm running git version 1.5.4.4 (installed via ports) on MacOS 10.5.2.