$ git clone -n https://src.fedoraproject.org/rpms/kf5-kwayland.git /var/lib/mock/f40-build-742067-110490/root/chroot_tmpdir/scmroot/kf5-kwayland
Cloning into '/var/lib/mock/f40-build-742067-110490/root/chroot_tmpdir/scmroot/kf5-kwayland'...
$ git fetch origin 70d453d724096322186a1285f2be9d5d30f3fc9c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kwayland
 * [new ref]         70d453d724096322186a1285f2be9d5d30f3fc9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70d453d Rebuild (qt5)