Eric S. Raymond wrote a tool called reposurgeon[0] for just this purpose. Coincidentally, he used it to migrate Emacs to Git and clean up the repo, although I'm

Eric S. Raymond wrote a tool called reposurgeon[0] for just this purpose. Coincidentally, he used it to migrate Emacs to Git and clean up the repo, although I'm not sure how much manual work he had to do to besides running reposurgeon. [0] http://www.catb.org/esr/reposurgeon/ http://www.catb.org/esr/reposurgeon/ [1] http://esr.ibiblio.org/?p=6524 http://esr.ibiblio.org/?p=6524