How to get aptitude to ignore broken dependency

[Alan Chandler <alan@chandlerfamily.org.uk>]

I have a problem

For some reason - not sure what - git-core is stuck at 1.6.2.1 whilst 
the remainder of the git utilities (such as gitk) have been upgraded to 
1.6.2.2

Because I need both git-core and gitk, but had accidentally deleted gitk 
when this issue arose, I manually installed gitk using dpkg --force 
depends

Now, aptitude says it can't resolve broken dependencies and wont install 
anything.

How can I get around this and force aptitude to ignore this broken 
dependency
-- 
Alan Chandler
http://www.chandlerfamily.org.uk