git am is choking characters from my commit messages

I'm using some private annotations in my git commit messages. For example, when I fixed something in module `MOD_A`, the commit message looks like this: ``` FIX [MOD_A] Fixed something ``` As long as there's `FIX` in front of `[MOD_A]`, everything works fine if I generate a patch using ``` git format-patch ``` send this patch as attachment to somewhere and then use ``` git am --keep-cr *.patch ``` in order to store this commit in another repo. But: If I don't have `FIX` in front of `[MOD_A]` (i.e. `[MOD_A] Fixed something`), the start of the message is missing in the other repo after doing `git am`. The whole commit message is only `Fixed something`. My suspicion is that it has something to do with the format of the Subject line of the E-Mail generated by `git format-patch`: ``` Subject: [PATCH 23/27] [MOD_A] Fixed something ``` It seems like because the `[PATCH 23/27]` is enclosed in squared brackets, also `[MOD_A]` is ignored. Is there a way to have my `[MOD_A]` not ignored?