That's not public git history though, those are just patches on mailing lists. Even before it goes into maintainer's lists, in my experience it's extremely rare that a maintainer will force push to their own public -next branch.
I see about 600 pull requests on github[1]. My understanding was that Linus moved away from mailing lists some time ago.
But then I'm not involved in kernel hacking.
The Linux kernel has a bot that reminds people that kernel development happens on the mailing list: https://github.com/KernelPRBot. Since GitHub does not allow for disabling the pull requests tab, the pull requests invariably get closed.
