$ git clone -n https://gitee.com/src-opencloudos-rpms/tcpdump.git /var/lib/mock/dist-oc9-build-45222-14591/root/chroot_tmpdir/scmroot/tcpdump
Cloning into '/var/lib/mock/dist-oc9-build-45222-14591/root/chroot_tmpdir/scmroot/tcpdump'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tcpdump
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4b4f88 import tcpdump-4.99.1-3.tl4