Defined in /home/build/jenkins/workspace/RockBootstrap19/FLAVOR/master/label/DebianUnstable/dev/.gems/gems/autoproj-1.9.2/lib/autoproj/default.osdeps as

git:
    debian:
        lenny: git
        default: git-core
      ubuntu: git-core
      gentoo: dev-vcs/git
      arch: git
      fedora: git
      darwin: git-core