(command.CommandList
  children: [
    (C {(Id.KW_Set set)} {(-e)})
    (C {(git)} {(log)} 
      {(--grep) (Id.Lit_Equals '=') (SQ (Token id:Id.Lit_Chars val:'^ARROW-[0-9]*:.*' span_id:78))} {(-n1)} {(--pretty) (Id.Lit_Equals '=') (format) (Id.Lit_Other ':') (Id.Lit_Other '%') (H)}
    )
  ]
)