Side note: as the chance with someone with those two precise builds would manifest is quite slim (but non-zero) you can technically build the game yourself at that point in time.
e.g. for 8212 the Jenkins matrix gives you the exact revision ,which in this case is e4d05a477c2bedc018b5444a17bfad55c5b9a4d2.
Once you have that hash you can “go back” in the git history with just a few commands (bascially git checkout e4d05a477) and compile the game for yourself.
neitsa@eagle ~/mnt/k/cdda/Cataclysm-DDA (master)
$ git show e4d05a477c2bedc018b5444a17bfad55c5b9a4d2
commit e4d05a477c2bedc018b5444a17bfad55c5b9a4d2
Merge: 58807ac9a7 07e8f24ec5
Author: ZhilkinSerg <ZhilkinSerg@users.noreply.github.com>
Date: Sun Nov 25 13:10:37 2018 +0300
Merge pull request #26815 from NotFuji/milstuff
Updated military and police professions
The instructions for compiling the game are available here. If you are on Windows you can just install Visual Studio Community and follow scrupulously the instructions.
Someone could obviously do it for you. But even if you’re not tech-savvy I think you would gain some knowledge from that experience, simply because once you know how to do it, you can go anywhere in the game history and compile the game for yourself. Big plus, this knowledge applies to all open source projects! If you feel you’d like to this by yourself, I’m sure the people on the discord server would be happy to guide you.