$ git clone -n https://src.fedoraproject.org/rpms/kwayland.git /var/lib/mock/f40-build-788819-135426/root/chroot_tmpdir/scmroot/kwayland
Cloning into '/var/lib/mock/f40-build-788819-135426/root/chroot_tmpdir/scmroot/kwayland'...
$ git fetch origin 9d00358bd6de4bd59529cf134fe6baf467c78bca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwayland
 * [new ref]         9d00358bd6de4bd59529cf134fe6baf467c78bca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d00358 6.0.0