If a web application contains a .git directory, you can retrieve all its content using the command wget -r http://web.com/.gitarrow-up-right.
wget -r
http://web.com/.git
Afterward, you can examine the modifications by employing git diff.
git diff
Last updated 1 year ago
$ ./gitdumper.sh -h bash gitdumper.sh http://target.tld/.git/ dest-dir