$ git clone -n https://src.fedoraproject.org/rpms/koko.git /var/lib/mock/f42-build-side-1-3582688-46886/root/chroot_tmpdir/scmroot/koko
Cloning into '/var/lib/mock/f42-build-side-1-3582688-46886/root/chroot_tmpdir/scmroot/koko'...
$ git fetch origin dc7f675555fd1a33fb719883eab131c323e20e8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koko
 * [new ref]         dc7f675555fd1a33fb719883eab131c323e20e8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc7f675 25.04.3