Package: gitg Version: 3.14.1-1 I installed gitg from experimental, but when I ran it the diff/files plane was blank. There was an error in stderr basically saying gir1.2-peas-1.0 was missing. Installing gir1.2-peas-1.0 made the diff/files plane work.
So gir1.2-peas-1.0 should be a dependency of gitg, at least with version 3.14.1-1. I'm running mostly testing (Jessie), with some stable, unstable and experimental mixed in on AMD64.
