$ git clone -n https://gitee.com/wency_cn/postfix_1770358209.git /var/lib/mock/dist-an23-build-511932-75090/root/chroot_tmpdir/scmroot/postfix_1770358209
Cloning into '/var/lib/mock/dist-an23-build-511932-75090/root/chroot_tmpdir/scmroot/postfix_1770358209'...
$ git fetch origin 02a7ce6f8b5cef1025bfca203ad91889614d5db6:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/postfix_1770358209
 * [new ref]         02a7ce6f8b5cef1025bfca203ad91889614d5db6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02a7ce6 Update code from upstream