That’s the power of GitHub. The fork still shows idolize as the author and clearly has gpl3 license (added by idolize). They can change what they want in the original repo, but the fork is covered forever, and ironclad proof of the licensing. If OP’s code is based off this fork, unmodified (of which it’s a fork, also ironclad proof it’s that gpl3 version) then it’s also gpl3. Saaaafe. This should be open and shut on github’s end, just a dumb DMCA report.
That’s the power of GitHub. The fork still shows idolize as the author and clearly has gpl3 license (added by idolize). They can change what they want in the original repo, but the fork is covered forever, and ironclad proof of the licensing. If OP’s code is based off this fork, unmodified (of which it’s a fork, also ironclad proof it’s that gpl3 version) then it’s also gpl3. Saaaafe. This should be open and shut on github’s end, just a dumb DMCA report.