$ git clone -n https://gitee.com/opencloudos-stream/libx86.git /var/lib/mock/dist-oc9-epol-build-79582-53407/root/chroot_tmpdir/scmroot/libx86
Cloning into '/var/lib/mock/dist-oc9-epol-build-79582-53407/root/chroot_tmpdir/scmroot/libx86'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/libx86
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26058d0 update