I use git fork more as an educational tool than as a convenience, but it's not giving me as much detail as I would like.

I like that it says e.g.

Executing 'git remote add upstream https://github.com/openjdk/jdk'

but I'd like more details on what else it's doing - how is it creating a personal fork, how is it cloning. Is git fork equivalent to a 3-line shell script? I'd like to see that script!