Very little of git as used by most people is Perl these days; almost everything has been rewritten in C by now. A few things remain, but they're pretty niche: git-send-email, the git-cvs tools (!), git-svn, and git-fast-import (maintained in the contrib/ tree) look to be the only top-level perl things left, at a glance.
formerly_proven|3 years ago
... wait those are actually Tcl.