>>> To create one patch out of all the commits?
>>
>> Yes, please.
>
> Maybe it can be done like this. 
>
> $ git format-patch -2 HEAD --stdout > 0001-all.patch

I didn't find a command to change the commit message of the
patch but I think one can just as well do that manually by
editing the patch like any other file.

Here is the modified version with everything, I think.