$ git clone -n https://src.fedoraproject.org/rpms/kf6-kdav.git /var/lib/mock/f42-build-3364276-45044/root/chroot_tmpdir/scmroot/kf6-kdav
Cloning into '/var/lib/mock/f42-build-3364276-45044/root/chroot_tmpdir/scmroot/kf6-kdav'...
$ git fetch origin ffa1ae5b55cfe86a07c9c250d5d59b5a86a3aa72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kdav
 * [new ref]         ffa1ae5b55cfe86a07c9c250d5d59b5a86a3aa72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffa1ae5 6.12.0