Obtaining `git describe` directly from LaTeX document without any intermediate files.

build.sh

#!/bin/bash

# obtaining the name of either the remote origin repo or the local directory if no origin defined
DIRNAME=${PWD##*/}
JOBNAME=$(git config --get remote.origin.url | xargs basename || echo $DIRNAME".loc")

# compiling
latexmk -pdf -pdflatex="pdflatex --enable-pipes --shell-escape --enable-write18 %O %S" -jobname=$JOBNAME -output-directory="./build/" document.tex
latexmk -c -jobname=$JOBNAME -output-directory="./build/"

docrevhistory.tex

% The git command is interpreted as LaTeX source
% The command formats output to be later converted by the csvsimple package
% as CSV file contents

\usepackage{newverbs}[2011/07/24] %(for Verbdef)
\Verbdef\perc{%}
\newcommand{\revhist}{
	% \usepackage{newverbs}[2011/07/24] %(for Verbdef)
	%\Verbdef\perc{%} % percent character must be used as-is to the shell command
	% Verbdef must be declared outside the function!
	% other characters may be used aspercent-encoding characters (like in URLs):
	% %26 - ampersand sign, %5C - backslash
	\begin{tabular}{|r|c|c|l|}
		\hline 
		ver. & date & author & description \\ 
		\hline 
		\input|"git for-each-ref --sort=taggerdate --format=\perc(refname:short)\perc26\perc(taggerdate:short)\perc26\perc(taggername)\perc26\perc(subject)\perc5C\perc5C refs/tags/"
		\hline 
	\end{tabular}
}

\section*{Document revision history}
\revhist

gitdescribe.tex

\newcommand{\version}{\input|"git describe --always --dirty='*'"}

% Obtaining `git describe` directly from LaTeX document without any intermediate files.
\newcommand{\gitdescribe}{
	% If there is any tag defined -print the result of git describe
	% if there are no tags -print the shoart hash of current commit
	% if some of the changes are not commited -print appropriate message
	% Sell pipeline access is required, so depending on the LaTeX distro
	% one has to compile with special command arguments:
	% MiKTeX (@win): --enable-pipes
	% other may require (and/or?): --enable-pipes --shell-escape --enable-write18
	\IfFileExists{|"git status || echo got"} % check if there is access to any shell cmd (or \usepackage{pdftexcmds})
	{
		\jobname{} ver. \version
	}
	{
		\errmessage{No access to shell to run Git commands!
			Compile with --enable-pipes --shell-escape --enable-write18
			(pdf)latex options.}
	}
}