Why do we need [PATCH]?

Hi git's.

I've just applied a patch to my git tree using git-applymbox. It worked like a charm as it often do. But then when I did a quick check with gitk it stuck me that the subject was prefixed with [PATCH]. I am aware that the [PATCH] in subject tell me: "patch is received from somewhere and applied by me to the .git tree". This is in comparsion to patches received when I merge a git tree for example.

But with common practice to use sign-off I wonder the value of this
patch marker.
When browsing the kernel shortlog I often focus on first word in subject
- cause this tells me what system/drivers is changed. But with the
  [PATCH] marker I have to read some non-sense to see actual subject.

The information is redundant since metadata already tell me who is the author and who committed the change. So could we have it removed or if people continue to find it usefull then at least hide it behind some option. Using the [PATCH] prefix is not the natural thing to do with git.

I looked at the source and found the -k option, but adding [PATCH] should not be default behaviour so this is not the correct solution.

	Sam