Cloning this repository:

git clone git://gitorious.org/0xdroid/external_dosfstools.git external_dosfstools
cd external_dosfstools

Add this repository as a remote to an existing local repository:

git remote add external_dosfstools git://gitorious.org/0xdroid/external_dosfstools.git
git fetch external_dosfstools
git checkout -b my-local-tracking-branch external_dosfstools/master_or_other_branch