$ git clone -n https://src.fedoraproject.org/rpms/libmpd.git /var/lib/mock/f45-build-16599-488/root/chroot_tmpdir/scmroot/libmpd
Cloning into '/var/lib/mock/f45-build-16599-488/root/chroot_tmpdir/scmroot/libmpd'...
$ git fetch origin 6aaf86120949e1a87897ae0d9c8b91cb73d7af48:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmpd
 * [new ref]         6aaf86120949e1a87897ae0d9c8b91cb73d7af48 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6aaf861 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild