After up2date installs packages as requested, it prints debugging
messages as it cleans up /var/spool/up2date:
# up2date -i aoliva-base
[a few seconds elapse]
pkg to remove: ['aoliva-base', '0', '30', '', 'noarch', 5466L,
Version-Release number of selected component (if applicable):
`pkg to remove' debug messages appear to be gone in rawhide.