Clients started using our system after a lot of infrastructure issues, a few days later everything stopped working. Hell break loose in the company one day the developers fix the issue next day was something similar. After a week of threats, fights and gunshots, one of the colleagues found out that one DB script file is missing, git history can't show why. After going a bit deeper with other tools, they found that I did a fucked up git merge that overwritten the original script. And that was 3 months ago...needless to say that the team got very, very pissed... So my tip is, be careful with git mine and theirs because that can fuck you up...