Is there an easy way to just unmark files wrongly marked as added?

I'm not thinking about something like git-reset --mixed,
which would discard the index as a whole.
I only want to unmark files I git-add(1)ed.

--=20
GPG Key id:  0xD1F10BA2
Fingerprint: 96E2 304A B9C4 949A 10A0  9105 9543 0453 D1F1 0BA2

AstralStorm