Sheriffs and other civil officers executing the warrants of arrest or process of courts-martial pursuant to this chapter shall receive as compensation therefor the fees allowed by law for like services in the criminal courts, the same to be taxed by such courts-martial. All such fees and expenses of trial in court-martial cases, and the fees of sheriffs and jailers in all such cases for the keep of prisoners, shall be paid by the Adjutant General out of appropriations available to him.