$ git clone -n https://src.fedoraproject.org/rpms/gnome-chess.git /var/lib/mock/f40-build-790878-136883/root/chroot_tmpdir/scmroot/gnome-chess
Cloning into '/var/lib/mock/f40-build-790878-136883/root/chroot_tmpdir/scmroot/gnome-chess'...
$ git fetch origin 594692a86255f29e0a45887ea20bb8fa94bd2cac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-chess
 * [new ref]         594692a86255f29e0a45887ea20bb8fa94bd2cac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 594692a Update to 46.beta