He doesn't have a problem with git per se, at least not overtly. I think the confusion is that Emacs went with Bazaar over Git in 2008 essentially because it was a GNU project (and Arch had faded into obscurity by that point):
>We should use Bzr because that is becoming a GNU package. GNU packages should show loyalty to each other when possible, and in this case it is possible.[1]
But now its main repository is managed with git[2], Savannah as a whole makes extensive use of git,[3] and Stallman tacitly supports git by linking to git repos from his personal website.[4]