I love Github.com's ability to use remote Themes. I'm particularly fond of pmarsceill/just-the-docs.
I tried to refer to that on our Github Enterprise (GHE) instance which doesn't talk to the internet and thus page build fails.
Next I created a clone in my GHE account and changed the entry in the _config.yaml -> same error.
What are the steps I need to do to be able to use the remote theme (or additional theme) on an internet disconnected GHE instance?