I've found the reason behind the extremely annoying SSL certification
refusals.
When I use an installation image, the date is not necessarily set at the
real date. In my case, `date` was set in 2019, and triggered the SSL
verification refusal (not yet valid).
I don't know why it sometimes doesn't happen. If we can't fix/automate
it at the time we boot in the installation medium, we should probably
add a warning in the manual / a hint in guix pull / a proper error in
guile-git (that could provide more information than just Git failing) ?
WDYT ?
Best regards,
Nicolas
