Megadeth’s Dave Mustaine has guested on a new track from country artist Brett Kissel. The song, titled “Damn!,” Is featured on Kissel‘s latest album “We Were That Song.” I am so pumped my bud @BrettKissel's new album is out TODAY! I'm especially excited about TRACK #10: "DAMN!" Get it here: https://t.co/GvSZw37n6z pic.twitter.com/wsqSLUOh7e — Dave Mustaine…