As someone who's contributed to Wikipedia and seen how the sausage is made: that's stupid. Even Wikipedia itself considers wikis (including itself) to lack sufficient authority to be cited as a source.
Such citations could be easily gamed (if you cite a particular change) or are useless (the content you cite may not be there in the future), and are obvious pathways to "citogenesis."
Wikipedia tries to kick the bucket by going with what "reliable" secondary sources say. Thus the goal is not to say the capital T Truth, but to essentially sumnarize academic knowledge.
To steal a saying - its the worst method except for every other known method.
If anyone has a better idea how to determine what is true and what isn't - i'd certainly be very interested.
We need "open access" knowledge systems with known authors who are sponsored by non-profit and educational organizations and its their duty to defend their reputation.
Humanity needs more openly accessible curated and factually checked information and "open to modify" systems are bad at in all.
Of course agreeing on collective facts is extremely messy.
Show me a better attempt, please.