$ git clone -n https://gitee.com/src-opencloudos-rpms/tcpdump.git /var/lib/mock/dist-oc9-build-68194-46914/root/chroot_tmpdir/scmroot/tcpdump
Cloning into '/var/lib/mock/dist-oc9-build-68194-46914/root/chroot_tmpdir/scmroot/tcpdump'...
$ git fetch origin 9085e3674ffe15adbd5a5d1a99eb5eb1ad59f7a4:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tcpdump
 * [new ref]         9085e3674ffe15adbd5a5d1a99eb5eb1ad59f7a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9085e36 import tcpdump-4.99.4-1.tl4