What problem/threat is dgit meant to solve/guard against? Is it: a) the people problem of coworkers not knowing the difference between a repository (e.g. on gi

What problem/threat is dgit meant to solve/guard against? Is it: a) the people problem of coworkers not knowing the difference between a repository (e.g. on github), a remote (the name "origin") or even a branch (the label "master") b) github.com turning evil or going away forever c) myhost.example.com failing for hours or days