so this is probably not possible, and probably a stupid question, but I’m going to ask it anyway.
Programmer Z has created a main repository.
Programmer X has a fork of that repository.
I need to create a copy of programmer X’s fork, work on my copy, and send pull requests to programmer X, not to the main repository or to Programmer Z.
I also do NOT want programmer X or programmer Z to automatically send updates to my version of the repository.
Can I do this? And if so, how with the GUI and how with the command line?