Watch Jason Isbell and Amanda Shires Cover Warren Zevon's 'Mutineer'

While Jason Isbell and Amanda Shires gear up for a March recording session with producer Dave Cobb — whose Nashville studio has helped spawn some of the decade’s best roots albums, including Isbell’s Southeastern and Sturgill Simpson’s Metamodern Sounds in Country Music — the Americana power couple is tossing a bone to fans…