> Git is an Open Source project covered by the GNU General Public
License version 2 (some parts of it are under different licenses,
compatible with the GPLv2).
"This is a brief heads-up that the reason I’ve been blog silent lately is that I’m concentrating hard on a sprint with what I consider a large payoff: getting the Emacs project fully converted to git. In retrospect, choosing Bazaar as DVCS was a mistake that has presented unnecessary friction costs to a lot of contributors. RMS gets this and we’re moving.
I’m also talking with RMS about the possibility that it’s time to shoot Texinfo through the head and go with a more modern, Web-friendly master format. Oh, and time to abolish info entirely in favor of HTML. He’s not entirely convinced yet of this, but he’s listening."
He's also involved in freeing code-repositories from their prisons, and porting them to other versioning systems, with the Reposurgeon. See https://gitorious.org/reposurgeon/
"reposurgeon enables risky operations that version-control systems don’t want to let you do, such as (1) editing past comments and metadata, (2) excising commits, (3) coalescing commits, and (4) removing files and subtrees from repo history. The original motivation for reposurgeon was to clean up artifacts created by repository conversions. It also functions as a repository conversion tool. Supported VCSes include git, hg, bzr, and Subversion."
GPLv2-or-layer is effectively GPLv2 plus recipient-friendly features. It is NOT suitable for the intended purpose of GPLv3, which adds restrictions on the recipient (for the benefit of 2nd-order recipients of derivatives).