\documentclass{beamer}

\input{vc.tex}

\author{Mart Lubbers}
\title{Git flashtalk}
\date{\today}

\begin{document}

\begin{frame}
	\maketitle
	\let\thefootnote\relax
	\footnotetext{Git \GITAbrHash, \GITAuthorDate, \GITAuthorName.}
\end{frame}

\end{document}
