$ git clone -n https://gitee.com/src-opencloudos-rpms/lz4.git /var/lib/mock/dist-oc9-build-70712-47464/root/chroot_tmpdir/scmroot/lz4
Cloning into '/var/lib/mock/dist-oc9-build-70712-47464/root/chroot_tmpdir/scmroot/lz4'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/lz4
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e6a745 import lz4-1.9.4-2.tl4