$ git clone -n https://src.fedoraproject.org/rpms/freecol.git /var/lib/mock/f39-build-1673572-40874/root/chroot_tmpdir/scmroot/freecol
Cloning into '/var/lib/mock/f39-build-1673572-40874/root/chroot_tmpdir/scmroot/freecol'...
$ git fetch origin f783cf3cbe1f6e1e34c996f13305cb5bbf15f876:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freecol
 * [new ref]         f783cf3cbe1f6e1e34c996f13305cb5bbf15f876 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f783cf3 added forgotten patch