git doesn't know the concept of a Pull Request? https://git-scm.com/docs/git-request-pull
Bugzilla is for bugs and that's the point, right? A project is not a set of bugs...
A GIT "request-pull" generates a (mail) text with a patch which is to be send to a mailinglist. It's just the automated version of 'git format-patch' which also generates the e-mail message text. It is nothing like a Github PR.
Also Linux doesn't use pull requests. GIT doesn't even know the concept of a PR. You are supposed to generate a patch with 'git format-patch' and submit it to a mailinglist.
[1] https://bugzilla.kernel.org/