$ git clone -n https://src.fedoraproject.org/rpms/libffado.git /var/lib/mock/f40-build-1932796-25125/root/chroot_tmpdir/scmroot/libffado
Cloning into '/var/lib/mock/f40-build-1932796-25125/root/chroot_tmpdir/scmroot/libffado'...
$ git fetch origin a8e5c77510c1c50a6e688070b1bb749af5fcc7b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libffado
 * [new ref]         a8e5c77510c1c50a6e688070b1bb749af5fcc7b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8e5c77 Update to fixed tarball