$ git clone -n https://gitee.com/opencloudos-stream/postfix.git /var/lib/mock/dist-ocs23-build-27869-1191/root/chroot_tmpdir/scmroot/postfix
Cloning into '/var/lib/mock/dist-ocs23-build-27869-1191/root/chroot_tmpdir/scmroot/postfix'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/postfix
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4aaa33 !1 Rebuilt for libpq 15.3 Merge pull request !1 from abushwang/master