Cloning this repository:

git clone git://gitorious.org/android-on-freerunner/platform_external_alsa-lib.git platform_external_alsa-lib
cd platform_external_alsa-lib

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

git remote add platform_external_alsa-lib git://gitorious.org/android-on-freerunner/platform_external_alsa-lib.git
git fetch platform_external_alsa-lib
git checkout -b my-local-tracking-branch platform_external_alsa-lib/master_or_other_branch