git submodule status |
    while read l; do
        # checkout each submodule
        local hash=$(echo $l | sed 's,^-\([0-9a-f]*\) \(.*\)$,\1,');
        local dir=$(echo $l | sed 's,^-\([0-9a-f]*\) \(.*\)$,\2,');
        local url=$(sed -n "\,$dir, { :loop; n; s,^.*url = ,,; T loop; p; q }" .git/config);
        clone "$dir" "$url" "$hash" "";
    done;

    git submodule update
    git submodule status