$ git clone -n https://src.fedoraproject.org/rpms/kf6-kfilemetadata.git /var/lib/mock/f40-build-2218393-52601/root/chroot_tmpdir/scmroot/kf6-kfilemetadata
Cloning into '/var/lib/mock/f40-build-2218393-52601/root/chroot_tmpdir/scmroot/kf6-kfilemetadata'...
$ git fetch origin 3caac907d4174ce8f2a5c6e870f4348cd20eb612:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kfilemetadata
 * [new ref]         3caac907d4174ce8f2a5c6e870f4348cd20eb612 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3caac90 fix changelog