$ git clone -n https://gitee.com/src-opencloudos-rpms/samba /var/lib/mock/dist-oc8-build-57107-15237/root/chroot_tmpdir/scmroot/samba
Cloning into '/var/lib/mock/dist-oc8-build-57107-15237/root/chroot_tmpdir/scmroot/samba'...
$ git fetch origin oc8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/samba
 * [new branch]      oc8        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aec4448 import samba-4.17.5-3.tl3