ssh connect back?

Hi group,
This is what I want to achieve:
I connect per ssh to a computer an the internet. Works fine. Now I
have a svn-repository on my local machine (behind firewall) and I want
to do a svn checkout from this repository on the remote machine. So I
need to somehow connect back to the machine where the ssh originated.
Is it possible to do this? (Without issuing a seperate ssh-connection
back which probably won't work because of the firewall)