$ git clone -n https://gitee.com/opencloudos-stream/lightdm-gtk.git /var/lib/mock/dist-oc9-epol-build-105608-66606/root/chroot_tmpdir/scmroot/lightdm-gtk
Cloning into '/var/lib/mock/dist-oc9-epol-build-105608-66606/root/chroot_tmpdir/scmroot/lightdm-gtk'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/lightdm-gtk
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 538bdb1 update