$ git clone -n https://src.fedoraproject.org/rpms/kf5-kwayland.git /var/lib/mock/f40-build-2560580-62124/root/chroot_tmpdir/scmroot/kf5-kwayland
Cloning into '/var/lib/mock/f40-build-2560580-62124/root/chroot_tmpdir/scmroot/kf5-kwayland'...
$ git fetch origin a9216270f6913c24a2eb4b28e7081b480e49006f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kwayland
 * [new ref]         a9216270f6913c24a2eb4b28e7081b480e49006f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a921627 Rebuild (qt5)