$ git clone -n https://gitee.com/src-opencloudos-rpms/linux-atm.git /var/lib/mock/dist-oc9-build-70644-47457/root/chroot_tmpdir/scmroot/linux-atm
Cloning into '/var/lib/mock/dist-oc9-build-70644-47457/root/chroot_tmpdir/scmroot/linux-atm'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/linux-atm
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31612a7 import linux-atm-2.5.2-1.tl4