$ git clone -n https://gitee.com/opencloudos-stream/selinux-policy.git /var/lib/mock/dist-ocs23-build-29753-1191/root/chroot_tmpdir/scmroot/selinux-policy
Cloning into '/var/lib/mock/dist-ocs23-build-29753-1191/root/chroot_tmpdir/scmroot/selinux-policy'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/selinux-policy
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5950fec !1 Upgrade to 38.21 Merge pull request !1 from gordonwwang/master