$ git clone -n https://gitee.com/src-opencloudos-rpms/m4.git /var/lib/mock/dist-oc9-build-42894-14591/root/chroot_tmpdir/scmroot/m4
Cloning into '/var/lib/mock/dist-oc9-build-42894-14591/root/chroot_tmpdir/scmroot/m4'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/m4
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9795ed import m4-1.4.19-3.tl4