$ git clone -n https://gitee.com/opencloudos-stream/postfix.git /home/lib/mock/dist-ocs23-build-233521-19976/root/chroot_tmpdir/scmroot/postfix
Cloning into '/home/lib/mock/dist-ocs23-build-233521-19976/root/chroot_tmpdir/scmroot/postfix'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/postfix
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4cc636b Rebuilt for loongarch release