Workplaces, schools, and other such organzations usually use some sort of web proxy that allows requests out through the firewall to be redirected properly. What these proxies normally don’t allow is any outbound git or ssh traffic. So it makes sense to use the web (https) form of URLs where normally you would use git@github.com. We’ll see how this holds up over time since GitHub has said it is moving away from HTTPs, but mine worked without any password prompting at all making me thing that somehow my keys are still being used.