How can I get one image as a header that is not just the header but extends to the top of the page limits and also left and right? I have see this Minipage in Header? but is not to have the image to the top of the page limits, and this How do I put the top of an image at the top of a page but I do not understand what to do
I have tried this but the result is not the expected. When Ι replace width=\textwidth with width=\pagewidth does not work.
\documentclass{article}
\usepackage{kantlipsum}
\usepackage{fancyhdr}
\usepackage[demo]{graphicx}
\usepackage[right=2.5cm,left=2.5cm,top=2.5cm,bottom=2.0cm,total={165mm,243mm},showframe,includeheadfoot]{geometry}
\pagestyle{fancy}
\fancyhead[L]{%
% \centering
% \vspace{-7cm}
\includegraphics[width=\textwidth,height=2.5cm]{logo.png}
}
% \fancyfoot[L]{\thepage}
\begin{document}
\kant
\end{document}

Update-1 What I want is probably very close to this approach http://www.texample.net/tikz/examples/fancy-chapter-headings/ but not be connected to the chapter but with one image