Due to popular demand I moved debian apt and python-apt from bzr to git today. Moving was pretty painless:
$ git init $ bzr fast-export --export-marks=marks.bzr -b debian/sid /path/to/debian-sid | git fast-import --export-marks=marks.git
And then a fast-import for the debian-wheezy and debian-experimental branches too. Then a
$ git gc --aggressive
(thanks to Guillem Jover for pointing this out) and that was it.
The branches are available at: