The year of the build is embedded in various documentation:

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/python-gitlab.html

  /usr/share/doc/python-gitlab-doc/html/api/gitlab.v4.html

  2018-2023,·python-gitlab·team.
  vs.
  2018-2022,·python-gitlab·team.


The attached patch fixes this by adjusting doc/conf.py to use the
SOURCE_DATE_EPOCH environment variable to determine the date to use for
the year.


With this patch applied, python-gitlab should build reproducibly on
tests.reproducible-builds.org again!


Thanks for maintaining python-gitlab!


live well,
  vagrant

We believe that the bug you reported is fixed in the latest version of
python-gitlab, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1009339@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Federico Ceratto <federico@debian.org> (supplier of updated python-gitlab package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sat, 11 Jun 2022 13:28:19 +0100
Source: python-gitlab
Architecture: source
Version: 1:3.5.0-1
Distribution: unstable
Urgency: medium
Maintainer: Federico Ceratto <federico@debian.org>
Changed-By: Federico Ceratto <federico@debian.org>
Closes: 1009339
Changes:
 python-gitlab (1:3.5.0-1) unstable; urgency=medium
 .
   * New upstream release
   * Fix reproducible building documentation (Closes: #1009339)
     Kudos to Vagrant Cascadian
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