It was a reformulation from a popular drink where wine was infused with coca leaves and kola nuts, popular with Pope Leo XIII who appeared on poster advertisements for it. (and many others)

Georgia passed prohibition and coca-cola was an invention to replace the now banned beverages.

Is that tonic wine? Like buckfast?

Same kind of thing as Buckfast, long out of production but somebody tried to revive it a decade ago.

https://en.wikipedia.org/wiki/Vin_Mariani

https://commons.wikimedia.org/wiki/File:Mariani_pope.jpg

Cola nut also contains caffeine, so quite an energy drink between the two.