You can clone with
HTTPS or Subversion.
When using sprites, the generated css contains relative paths, which means that if you're working on a cdn - you will get an 404 error.
In the compass config file you can use "images_path" instead of the "images_dir", but scout seems to override this.
I'm having this issue too.
If you could download the latest 0.6.0 RC1 candidate, you should be able to use a config file to set this and simply leave the images/js directory input field blank in Scout App. This blog post may be helpful http://www.continuousthinking.com/2012/05/14/scoutapp-0-6-0-rc1.html
Let me know if you have any further questions. Thanks,