The closest I can suggest is TheSans Black from LucasFonts. The G is not quite so closed, but would be a simple modification.

Oh my God 70's type is back. In the 70s type was so tight they turned Dog into God. Yuck!

Dan, are you sure it wasn't the other way around? :-)

Corpid Black from FontFabrik at Fonts.com is also somewhat similar. Don't like that Fonts.com doesn't tell you the designer. Price is a bit steep too, unless there are multiple faces in the font.

Seems that FontFabrik is Luc(as) De Groot's company too. Here is a sample of Corpid Black Caps. Could the SC lower case letters be even closer to the sample?

You can mimic the face (if you only need de logo) using Futura and Kabel (for the _G_), slightly condensed and edited.

http://www.myfonts.com/fonts/neufville/futura-nd/bold/testdrive.html?s=SMOG-HOG&p=72

http://www.myfonts.com/fonts/linotype/kabel/black/testdrive.html?s=SMOG-HOG&p=72