$ git clone -n https://src.fedoraproject.org/rpms/libldac.git /var/lib/mock/f45-build-16477-486/root/chroot_tmpdir/scmroot/libldac
Cloning into '/var/lib/mock/f45-build-16477-486/root/chroot_tmpdir/scmroot/libldac'...
$ git fetch origin 4d534d818d898487fe933e91e76a37e3d9a8b9d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libldac
 * [new ref]         4d534d818d898487fe933e91e76a37e3d9a8b9d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d534d8 2.0.2.6