Merging commits together into a super-commit

Hi,

I really love the fact I can micro-commit changes when I'm developing. However at some point the combination of changes I have made can be considered a single body of work. This is especially true when you start doing things like re-basing on code that has moved around a lot. You don't want to be correcting a whole bunch of merge failures for every commit in your current tree.

So far the only was I can see to do this is a:

git-diff master..HEAD > my.patch

And then re-applying your patch in stages, manually doing the commits.

Am I missing something?

I'm thinking something like git-cherrypick taking multiple commits and create a new super commit on a new tree. i.e.:

git-cherrypick -m "Valgrind fixes" 12345.. 12678.. 565757..

Merging the existing commit comments would be nice too.