Package: dpkg
Version: 1.3.12
sfere:/home/ftp/pub/debian/binary/base$ dpkg-buildpackage -h
[...]
Usage: dpkg-buildpackage [options]
Options: -r<gain-root-command>
[...]
-si (default) src includes orig for rev. 0 or 1 } genchanges
-sa uploaded src includes orig (default) }
Clearly one or the other of these is the default, but not both!
(S)