$ git clone -n https://src.fedoraproject.org/rpms/kf5-kfilemetadata.git /var/lib/mock/f40-build-2218496-52601/root/chroot_tmpdir/scmroot/kf5-kfilemetadata
Cloning into '/var/lib/mock/f40-build-2218496-52601/root/chroot_tmpdir/scmroot/kf5-kfilemetadata'...
$ git fetch origin b94ab0704b221e20e78eaf631cb57da40d12b206:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kfilemetadata
 * [new ref]         b94ab0704b221e20e78eaf631cb57da40d12b206 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b94ab07 remove kdegraphics-mobipocket