$ git clone -n https://gitee.com/src-opencloudos-rpms/busybox.git /var/lib/mock/dist-oc9-epol-build-53405-14768/root/chroot_tmpdir/scmroot/busybox
Cloning into '/var/lib/mock/dist-oc9-epol-build-53405-14768/root/chroot_tmpdir/scmroot/busybox'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/busybox
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d3b8ef import busybox-1.36.0-3.tl4