It's related to Git because of GitHub and the fact that it does not work without GitHub. They should've called it GitHubPitchesPowerPoint.
Git is a magic word and GitHub knows it. Spell 'git' to summon professionals of all kinds. But by releasing GitPeach, GitHub wants to show that its average 'dev' user needs help with making presentations. Is that really a problem? Presentations? Thanks, I don't need GitHub for presentations.