Cloning this repository:

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

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

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