Minecraft world edit rotate ball?

I'm currently trying to copy a sphere that looks upwards with World edit and rotate it so that it looks half down. So that I can make a whole out of half a ball. I know that I can make whole balls in one go, but I want to try something. Is there a command?

Either // rotate or // deform rotate

// deform rotate (x, x, 180)

possibly could not work depending on the version.

Didn't work. Looked kind of crippled from xD but get a thank you.