From: http://codysoyland.com/2010/jun/6/ssh-tip-automatic-reverse-tunnels-workflow-simplif/
Find the remote file:
local:~$ ssh remote
remote:~$ find . -name 'file.tar.gz'
/home/cody/somewhere/deep/file.tar.gz
On local, scp:
local:~$ scp remote:/home/cody/somewhere/deep/file.tar.gz .