If the URL to a private repo is not secure, then a whole bunch of people (including GitHub) have a big problem, and exposing jobmachine is the least of their worries ;-)
It's not a security problem, or else my comment would have been much more adamant about removing the link. It's mostly just reader confusion. Seeing the git clone url led me to believe the project was open sourced and was disappointed to find that not to be the case.
It's currently specialized for our specific use case and would not be useful for anyone else, I think. I'm sure that we will keep iterating on it though, so perhaps it will become more general-purpose in the future so we might look into open-sourcing it then. But I can't promise anything, sorry!