$ git clone -n https://gitee.com/opencloudos-stream/apt-cacher-ng.git /var/lib/mock/dist-oc9-epol-build-90384-59047/root/chroot_tmpdir/scmroot/apt-cacher-ng
Cloning into '/var/lib/mock/dist-oc9-epol-build-90384-59047/root/chroot_tmpdir/scmroot/apt-cacher-ng'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/apt-cacher-ng
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c96650 update