$ git clone -n https://gitee.com/src-opencloudos-rpms/bc.git /var/lib/mock/dist-oc9-build-62325-16463/root/chroot_tmpdir/scmroot/bc
Cloning into '/var/lib/mock/dist-oc9-build-62325-16463/root/chroot_tmpdir/scmroot/bc'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/bc
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c99cd1 import bc-1.07.1-4.tl4