$ git clone -n https://gitee.com/src-opencloudos-rpms/tcpdump.git /var/lib/mock/dist-oc8-build-74666-50983/root/chroot_tmpdir/scmroot/tcpdump
Cloning into '/var/lib/mock/dist-oc8-build-74666-50983/root/chroot_tmpdir/scmroot/tcpdump'...
$ git fetch origin f279bff8ab82204de89551804e79460f06d8a4dc:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tcpdump
 * [new ref]         f279bff8ab82204de89551804e79460f06d8a4dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f279bff import tcpdump-4.9.3-5.tl3