$ git clone -n https://src.fedoraproject.org/rpms/kf5-kmime.git /var/lib/mock/f39-build-1550688-36951/root/chroot_tmpdir/scmroot/kf5-kmime
Cloning into '/var/lib/mock/f39-build-1550688-36951/root/chroot_tmpdir/scmroot/kf5-kmime'...
$ git fetch origin b2a01a04236a11c771f2177b265b08bb20800a1a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kmime
 * [new ref]         b2a01a04236a11c771f2177b265b08bb20800a1a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2a01a0 23.08.2