The trunk of the gnumach CVS repository is what will be GNU Mach 2.0. This was formerly called OSKit-Mach, and lived on the oskit-branch branch of the gnumach repository originally. That branch is now dead and the trunk reflects what that branch had plus more changes since it became the trunk. The branch gnumach-1-branch in the gnumach repository has the GNU Mach 1.x, sources, which have not changed since the 1.3 release.