\version "2.12.0"

\paper {
  ragged-last = ##f
}

\score {
  \new Staff {
    \time 4/4
    \relative c''' {
      \repeat volta 1 {
        s1*0 |
      } \alternative {
        { g,8 a g g~ g2~ |
          g2 r |
          \bar "||" }
      }
      \stopStaff
      \override Score.RehearsalMark #'break-visibility = #begin-of-line-invisible
      \once \override Score.RehearsalMark #'self-alignment-X = #LEFT
      \mark \markup {\musicglyph #"scripts.segno"}
      s1 |
      \repeat volta 1 {
        s1*0 |
        \bar ""
      } \alternative {
        { \revert Score.VoltaBracket #'stencil
          \override Staff.Clef #'full-size-change = ##t
          \startStaff
          \clef G
          g8 a g g~ g2~ |
          g1~ |
          g1\fermata |
          \bar "|." }
      }
    }
  }
  \layout {}
}