What are you talking about? amelius is mentioning an alternative to the hacky "git undo", not an alternative to git. You put your git repo onto the filesystem.
As far as administration, most devs will have elevated rights or can use FUSE or something. We could talk about needing administrative privileges to install git, too, but it's pretty far removed from the central topic.
> amelius is mentioning an alternative to the hacky "git undo", not an alternative to git.
Ah, so I misunderstood. Still, changing the filesystem under $HOME (or whatever is the working directory) is more difficult than using some user-level tool.