$ git clone -n https://gitee.com/opencloudos-stream/mythes-el.git /var/lib/mock/dist-oc9-epol-build-119058-69951/root/chroot_tmpdir/scmroot/mythes-el
Cloning into '/var/lib/mock/dist-oc9-epol-build-119058-69951/root/chroot_tmpdir/scmroot/mythes-el'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/mythes-el
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28c4075 update