GitHub should tie stars to commit hashes to avoid this sort of crap. Your repos stars is calculated from the started commits that are in this repo but not any it's forked from, on the default branch.

Still prone to abuse from transferring repo to credit somebody else, but the original repo owner would have to sign off on the transfer at least.

But... you did this intentionally--when it would have been easier and simpler to not do so? Doesn't really fit the mold of "clean it up later" chores.