\begin{frame}
    \frametitle{}
    % contenu (pas trop long) de la diapositive
    % contenu (pas trop long) de la diapositive
    \begin{tikzpicture}
        % Commit DAG
        \gitDAG[grow right sep = 2em]{
            A -- B -- { 
                C,
                D -- E,
            }
        };
        % Tag reference
        \gittag
        [v0p1]       % node name
        {v0.1}       % node text
        {above=of A} % node placement
        {A}          % target
        % Remote branch
        \gitremotebranch
        [origmaster]    % node name
        {origin/master} % node text
        {above=of C}    % node placement
        {C}             % target
        % Branch
        \gitbranch
        {master}     % node name and text 
        {above=of E} % node placement
        {E}          % target
        % HEAD reference
        \gitHEAD
        {above=of master} % node placement
        {master}          % target
    \end{tikzpicture}
    \begin{tikzpicture}
      \gitDAG[grow right sep = 2em]{
        A -- B -- { 
          C -- D' -- E',
          {[nodes=unreachable] D -- E },
        }
      };
      % Tag reference
      \gittag
        [v0p1]       % node name
        {v0.1}       % node text
        {above=of A} % node placement
        {A}          % target
      % Remote branch
      \gitremotebranch
        [origmaster]    % node name
        {origin/master} % node text
        {above=of C}    % node placement
        {C}             % target
      % Branch
      \gitbranch
        {master}      % node name and text 
        {above=of E'} % node placement
        {E'}          % target
      % HEAD reference
      \gitHEAD
        {above=of master} % node placement
        {master}          % target
      \SAandWT
    \end{tikzpicture}
\end{frame}