$ git clone -n https://src.fedoraproject.org/rpms/grilo-plugins.git /var/lib/mock/f45-build-13043-446/root/chroot_tmpdir/scmroot/grilo-plugins
Cloning into '/var/lib/mock/f45-build-13043-446/root/chroot_tmpdir/scmroot/grilo-plugins'...
$ git fetch origin 54366aeafff4deffe7d6cedc289d6002cf905b8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/grilo-plugins
 * [new ref]         54366aeafff4deffe7d6cedc289d6002cf905b8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54366ae Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild