$ git clone -n https://gitee.com/opencloudos-stream/mythes-bg.git /var/lib/mock/dist-oc9-epol-build-119075-69954/root/chroot_tmpdir/scmroot/mythes-bg
Cloning into '/var/lib/mock/dist-oc9-epol-build-119075-69954/root/chroot_tmpdir/scmroot/mythes-bg'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/mythes-bg
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c6d3d1 update