$ git clone -n https://src.fedoraproject.org/rpms/kwayland.git /var/lib/mock/f41-build-823474-153765/root/chroot_tmpdir/scmroot/kwayland
Cloning into '/var/lib/mock/f41-build-823474-153765/root/chroot_tmpdir/scmroot/kwayland'...
$ git fetch origin aa846683a67d3c89a075d156b8be8f859853ed8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwayland
 * [new ref]         aa846683a67d3c89a075d156b8be8f859853ed8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa84668 rebuild