$ git clone -n https://gitee.com/wenjie2025/tcpdump.git /var/lib/mock/dist-an23-build-493457-74562/root/chroot_tmpdir/scmroot/tcpdump
Cloning into '/var/lib/mock/dist-an23-build-493457-74562/root/chroot_tmpdir/scmroot/tcpdump'...
$ git fetch origin dc114a318680bd6da4776f4ca1c86453fb70fa73:KOJI_FETCH_HEAD
From https://gitee.com/wenjie2025/tcpdump
 * [new ref]         dc114a318680bd6da4776f4ca1c86453fb70fa73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc114a3 Update code from upstream