Sadly the issue is there is no community around any other particular fork. Technically, there are many forks, mostly for hardware / distro reasons. If you wanted to be sure there are no “AI / LLM” contributions in the kernel, 5.15 has an epoch around February. The other series but I’m not sure. I’d personally like to see a reset probably further back.
I looked into this a few months ago to see how I’d go about addressing it but the hope was that they would at least leave the ”Assisted By” tag to track these types of commits… but sadly I was wrong. Sadly, the Linux kernel and the community around it are no longer trustworthy.