Hercules vs. the Moon Men in its original 1964 Italian release was not about Hercules but was changed so as to have a more familiar hero for American audiences. It's directed by Giacomo Gentilomo.
The Internet Archive has it online:
Moria gives it one star. They admit to some good points but conclude, "On the other hand Hercules Against the Moon Men is really quite dull. It is poorly directed and photographed and many scenes simply fail to work on any level."