Generate bib file from master file locally, use local bib on overleaf

main.tex

% Close to the end of main tex file, have this:
% from https://tex.stackexchange.com/questions/596258/automatic-detection-of-overleaf-for-fallback-images/598669#598669

\ifnum\pdfstrcmp{\jobname}{output}=0  
  \bibliography{bibliography.bib}
\else
% wherever the master bib file is
  \bibliography{\string~/Documents/org/bibliography/references.bib}
\fi

% If using reftex-create-bibtex-file, use the following.
% It doesn't know how to handle the `\string`
% \bibliography{~/Documents/org/bibliography/references.bib}

pre-commit

#!/bin/sh

# This should be in the .git/hooks/pre-commit file

echo "generating bibliography.bib from master bib file"
# Asuming main.tex is the main file & bibliography.bib is the project bib file
bibexport -o bibliography.bib main.aux
git add bibliography.bib