to hit (on) some common ground

[Avid Learner]

Somebody wrote in an article in a US mag:
"We had hit on some common ground."

Is there any (subtle) difference in meaning compared to
"We had hit some common ground.", please?

Thank you in advance for any helpful hint.

 

[jutfrank]

The normal verb is find some common ground.

"We had found some common ground."

hit on has this meaning. hit doesn't work.