One tool I use daily for my git workflows (which are almost always composed of several git repositories) is mu-repo (which is a tool written in Python for dealing with multiple git repositories), so, I'm happy to announce that version 1.1.1 has just been released with a workflow which allows cloning multiple git repositories.
See: http://fabioz.github.io/mu-repo/cloning/ for details.
Also, given that it's gaining some traction recently, I decided to spend some time to actually do a homepage for it to help newcomers (the README on Github was becoming too big already):
As a note, I believe even long time users may benefit from taking a quick look at the Tips & Tricks section ;)
p.s.: mu-repo can now be installed through pip: pip install mu-repo.
p.s.2: Kudos to http://www.mkdocs.org for providing a nice tool to build a homepage from Markdown docs :)