\documentclass[14pt]{beamer}
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\usepackage{algorithmic}
\usepackage{algorithm}
\usepackage{graphicx}

\usepackage{helvet}
%\setbeamercovered{transparent}
\usecolortheme{crane}

\author[SC \& TH]{Stéphane Caron \and Thibaut Horel}
\institute{Technicolor Palo Alto}
\date{\today}
\title{Git Workshop}

\begin{document}

\begin{frame}
\titlepage
\end{frame}

\begin{frame}
...
\end{frame}

\begin{frame}
\begin{center}
\includegraphics[scale=.9]{figures/overview.pdf}
\end{center}
\end{frame}

\begin{frame}
\includegraphics[width=\textwidth]{figures/git-push.pdf}
\end{frame}

\begin{frame}
\includegraphics[width=\textwidth]{figures/git-pull.pdf}
\end{frame}

\begin{frame}
\includegraphics[width=\textwidth]{figures/git-pull-2.pdf}
\end{frame}

\begin{frame}
\includegraphics[width=\textwidth]{figures/git-merge-ok.pdf}
\end{frame}

\begin{frame}
\begin{center}
\includegraphics[scale=.9]{figures/git-merge-conflict.pdf}
\end{center}
\end{frame}

\end{document}