Here is the press release from Rep. Raúl Grijalva on the matter. Gizmodo coverage here.
And the briefs in Apache Stronghold v. United States (9th Cir.):
Religious Groups Amicus Brief
Religious Liberty Scholars Amicus Brief
Tribal Amicus Brief
Lower court materials here.
CA9 Order Denying Stay
Here is the order in Apache Stronghold v. United States (D. Ariz.):
57 DCT Order