put them in situation where renaming files won't cut it
completely agreed, but often the first example you show people needs to be simple enough to grok, not to mention to type. even showing a simple git example takes about an hour to account for typos, environmental mismatches, etc. showing a forking-diff-diffing-fork-merging-rebase-rebasing-merge-pulling-clone-while-solving-two-generals-problem-without-paxos will make people's heads explode. and first impressions often matter, for better or worse.