Not everything originates from jiu jitsu just because it's taught in classes today. Multiple submissions used in jiu jitsu originate from among others, Judo, Sambo, Submission Wrestling, etc.
Obviously Herman trains submission offense/defense in some fashion but that doesn't mean he has to take jiu jtsu classes to do it.
That said, he's obviously being facetious.
Helwani "I heard from your manager that your grappling coach used to train Nogueira and Anderson right?"
Herman "I don't know, he's from Brazil"