Wrong. That hammer is ALWAYS there along with a tomato.
Sorry, but it's not. If it was then I would have picked it up.
There are fixed-location hammers in the two places mentioned and in the undertaker's house and in Arhu's workshop. And everywhere.
It's literally impossible to not run into one hammer. Unless your game / save somehow got bugged.
Well then literally impossible has a new definition because they don't exist in my game so far that I can find. I'm level 5 and there isn't a single hammer anywhere.
And you guys can say hammers are in fixed locations all you want, but that's not going to change the fact that I haven't found a single hammer anywhere in my game yet.