$ git clone -n https://gitee.com/wenyuzifang/tcpdump.git /var/lib/mock/dist-an23-build-481815-74252/root/chroot_tmpdir/scmroot/tcpdump
Cloning into '/var/lib/mock/dist-an23-build-481815-74252/root/chroot_tmpdir/scmroot/tcpdump'...
$ git fetch origin 061742dcaf8c6b6a1c39107e70ab6a5ba6f96d63:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tcpdump
 * [new ref]         061742dcaf8c6b6a1c39107e70ab6a5ba6f96d63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 061742d Update code from upstream