$ git clone -n https://gitee.com/src-opencloudos-rpms/libffi.git /var/lib/mock/dist-oc9-build-63005-16463/root/chroot_tmpdir/scmroot/libffi
Cloning into '/var/lib/mock/dist-oc9-build-63005-16463/root/chroot_tmpdir/scmroot/libffi'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libffi
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d80710 import libffi-3.4.4-2.tl4