Alex Chaffee's blog
Sometimes I accidentally git add files. Or more often, I do git add . and get a huge changelist and then realize I want to move certain files to a different changelist or a different branch. I could do a git reset which, absent --soft or --hard, pulls all the changes out of the index (aka dircache aka staging area) but leaves them in the filesystem (aka working tree). But wouldn't it be nice to leave all the files in the index except the few I want to keep out?