I first saw this incident is this tweet.
🚨 BREAKING NEWS 🚨
— ꧁🇦🇺❶ 𝕕𝓡𝐨Ƥ 𝓞𝔽 𝐐🌏꧂ (@1_Drop_Of_Q) August 10, 2020
Now this footage has appeared.
UPDATE: More information from The Australian:
Victoria Police have arrested a young woman not wearing a mask who refused to reveal her name and address.
Video emerged on Monday of an altercation between the woman, 21, refusing to wear a mask and a Victoria Police protective service officer on Wellington Street in Collingwood at about 5pm on Monday.
A Victoria Police spokeswoman said the woman was not fined because she has a condition exempting her from wearing a face covering, which she did not say to the PSO.