$ git clone -n https://gitee.com/opencloudos-stream/arch-install-scripts.git /var/lib/mock/dist-oc9-epol-build-101171-65772/root/chroot_tmpdir/scmroot/arch-install-scripts
Cloning into '/var/lib/mock/dist-oc9-epol-build-101171-65772/root/chroot_tmpdir/scmroot/arch-install-scripts'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/arch-install-scripts
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c460c06 update