$ git clone -n https://gitee.com/opencloudos-stream/spectre-meltdown-checker.git /var/lib/mock/dist-oc9-epol-build-78604-53070/root/chroot_tmpdir/scmroot/spectre-meltdown-checker
Cloning into '/var/lib/mock/dist-oc9-epol-build-78604-53070/root/chroot_tmpdir/scmroot/spectre-meltdown-checker'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/spectre-meltdown-checker
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 078e18f update