Hertz is getting the Teslas, not Avis.
https://www.cnbc.com/2021/11/02/hertz-says-teslas-already-started-delivering-cars-despite-musk-tweet.html
Regarding Avis,
https://markets.businessinsider.com/news/stocks/avis-stock-price-possible-short-squeeze-elon-musk-hertz-tweet-2021-11