More on svn workflows

I have recently (1, 1.5 months ago?) started using a workflow similar to the one described here:

  http://www.spinics.net/lists/git/msg109896.html

(short summary: work in private branch, "merge --no-ff" into svn upstream, "merge" from svn upstream.)

... with the minor modification that I use "--squash" instead of "--no-ff". If I use --no-ff, I end up with a lot of "merge from master into <myprivatebranch>" commits on my master branch before I dcommit. It also merges in a lot of history that I feel like I shouldn't see-- that is, both the svn commit and my private branch's commit, and I'm worried about what might happen if I dcommit that. That said, I might be in that situation because I used --squash 3 or 4 times before I realized I was misremembering that thread.

Anyway, my current issue is that whenever I do a `git commit' after a "merge --squash", I end up with *everything* I've done since starting the branch in the commit message. To be more explicit, say I've got this setup:

  o--o--o                 master
         \
          o--o--o         private branch started

then I'll update master and merge it into my private branch:

  o--o--o--------D          master
         \        \
          A--B--C--o        private

test, merge --squash private into master and dcommit:

  o--o--o--------D---A'--B'--C'--D''     master
         \        \ /
          A--B--C--D'                    private

something happens upstream:

  o--o--o--------D---A'--B'--C'--D''--E        master
         \        \ /
          A--B--C--D'                          private

which I merge to private:

  o--o--o--------D---A'--B'--C'--D''--E        master
         \        \ /                  \
          A--B--C--D'-------------------E'     private

I do some work, commit F, and decide I want to push it upstream, so I'll do a merge --squash into master:

  o--o--o--------D---A'--B'--C'--D''--E-------F'   master
         \        \ /                  \     /
          A--B--C--D'-------------------E'--F      private

Now the issue is when I `git commit' the merge from private, git says this is a "squashed commit of the following", and lists the commit messages for A, B, C, D, D', D'' E, E' and F. I really just want the commit message for "F" in this case -- every other message is already on the trunk, in a different commit. This wasn't such a big issue at first: git picked up a few extra commits, so I hacked out the log messages before committing them on master. After doing this for a while though, there's something like 100 commits I have to wade through while doing this, and it's only going to get worse and worse.

On the other hand, I'm sure there's some option I could use so "git commit" would startup with an empty commit message in this case, but I do *want* the partial history, as it helps me design the commit message that I want the svn trunk's history to have.

What am I doing wrong?

-tom