$ git clone -n https://gitee.com/wency_cn/postfix_1770980367.git /var/lib/mock/dist-an23-build-514562-75110/root/chroot_tmpdir/scmroot/postfix_1770980367
Cloning into '/var/lib/mock/dist-an23-build-514562-75110/root/chroot_tmpdir/scmroot/postfix_1770980367'...
$ git fetch origin 75f7a79c0fc5b5789051ebb2da4fb1b2190fc477:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/postfix_1770980367
 * [new ref]         75f7a79c0fc5b5789051ebb2da4fb1b2190fc477 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75f7a79 Update code from upstream