$ git clone -n https://src.fedoraproject.org/rpms/openttd.git /var/lib/mock/f40-build-2238887-53587/root/chroot_tmpdir/scmroot/openttd
Cloning into '/var/lib/mock/f40-build-2238887-53587/root/chroot_tmpdir/scmroot/openttd'...
$ git fetch origin f6b38677da1799468c6c3e50d48c908b364a0a02:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openttd
 * [new ref]         f6b38677da1799468c6c3e50d48c908b364a0a02 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6b3867 Correct license and specify it in SPDX format