Random cat keeps digging my garden bed and pooping in it

I have this random cat that likes to come every night and dig a mound of soil and burry my plants and then take a shit in it.

How do I stop it? It's digging up my plants root and making it all dirty.

I have this random cat that likes to come every night and dig a mound of soil and burry my plants and then take a shit in it.

How do I stop it? It's digging up my plants root and making it all dirty.