‘git checkout filename’ is the equivalent of ‘svn revert filename’
edit: on second thought no it's really not very coherent. If you exclude <files> it means checkout all files if you write a <branch>, but no files if you write no <branch>. So excluding <branch> doesn't consistently do the same as using <current branch>. I guess git does kind of suck.
I can use git all right but the fact that I need about 20 different commands to do my job, 95% of them with extra parameters and almost all of them with names that don't reflect what I want to do from a functional point of view is utterly dumb. Again, functional! not technical! The UI should reflect end user functionality, not internal technical details.