how do i get rid of ground bees without making a mess?

leave them a month and the problem solves itself. most ground bees are solitary mining bees, don't sting unless you sit on one, and are gone by early summer. if you really want them moved they're there because the soil is bare and dry - water it heavily a few evenings running and mulch it. if it's one hole with angry stripy things pouring out, that's wasps, and that's a dusk job with wasp powder or a pro.