2 ways so far:

  • canonical name:

get-adgroup -identity "your group" -properties canonicalname | sel -property canonicalname [enter]

canonicalname

Your.Domain/ou name/ou name/your group

  • using the distinguishedname:

    $group = get-adgroup identity "your group" [enter]

    ($group.DistinguishedName -split"," ,2)[1] [enter] ou=name,ou,name,dc=your,dc=domain,dc=tld

sorry, I do not seem to get the right formatting, but you get the picture.