$ git clone -n https://gitee.com/opencloudos-stream/byacc.git /var/lib/mock/dist-ocs23-build-14604-1041/root/chroot_tmpdir/scmroot/byacc
Cloning into '/var/lib/mock/dist-ocs23-build-14604-1041/root/chroot_tmpdir/scmroot/byacc'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/byacc
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd2ea9b update