There is also a big difference between clicking `fork` on github vs cloning and creating a new repository (on github) and then changing the remote URL and pushing.
The latter isn't "github fork" even if it is a "git fork" and won't be affected by most[1] automated takedowns.
1> where most is defined as somewhere between 0 and 100%
https://help.github.com/en/github/collaborating-with-issues-...
I don't think that's true, I've personally recovered deleted repositories by finding its forks.
edit: Ah never mind it seems things work differently in the case of DMCA takedowns