Why is alcohol/liquor sometimes called "hooch?"

After the United States of America acquired Alaska from Russia in
1876, the Alaska territory was placed under military command and
a law was passed prohibiting the sale of liquor to native
Alaskans. The Alaskans learned to make their own liquor out of
flour, brown sugar, and fruits. This home-made concoction was
very strong, and was first produced in a small village called
Hoochinoo, near Sitka, Alaska.

The Alaskans called this liquor "hoochinoo." During the Klondike
Gold Rush, this name was shortened to "hooch."

Today, this term still applies to any liquor but especially to
strong or "bad" liquor.