Filtering mode changes

From: Stefan Naewe <stefan.naewe+git@gmail.com>
Date: Aug 1, 2008, 11:25 UTC
Message-ID: <loom.20080801T111754-982@post.gmane.org>

Hi there.

Here's my story:

- I did some minor modifications to a repo that I want to 'give back'.
- I worked on my own branch (of course).
- I was stupid to edit the files (that live on a linux box) through a windows
  network share.
- When I created diffs (using 'git format-patch') to send send 'upstream', I 
  noticed that the edited files got their executable bit set (old mode 100644 ->
  new mode 100755)
- I created another commit to undo the mode changes.

My question:

Is there a way to create clean diffs (between master and my branch) that don't contain the 'double mode change' (from 644 to 755 to 644) ?

TIA

Stefan