Cloning this repository:

git clone git://gitorious.org/~kevinvandervlist/keepassx/keepassx-kevinvandervlist.git keepassx-kevinvandervlist
cd keepassx-kevinvandervlist

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

git remote add keepassx-kevinvandervlist git://gitorious.org/~kevinvandervlist/keepassx/keepassx-kevinvandervlist.git
git fetch keepassx-kevinvandervlist
git checkout -b my-local-tracking-branch keepassx-kevinvandervlist/master_or_other_branch