Packages from the quarterly repository

[Mikhail Holt]

Hello everyone,

I am new here and have some questions regarding the FreeBSD package 
manager, pkg, and the quarterly repository.

I am building a FreeBSD v12 amd64 stable system.
I would like to use pre-compiled packages from repository 
https://pkg.freebsd.org/FreeBSD:12:amd64/quarterly/

 From this, https://wiki.freebsd.org/Ports/QuarterlyBranch, document it 
seems that:
- https://svnweb.freebsd.org/ports/branches/2020Q1/ was created in early 
Jan 2020 and
- https://pkg.freebsd.org/FreeBSD:12:amd64/quarterly/ was created from 
this branch sometime afterwards.
Am I understanding this correctly?

So I envisage, building the system, installing it and leaving it running 
so it can do its job.

If, in a few months(~May 2020), I need to install a new package, will I 
get a package from repository 
https://pkg.freebsd.org/FreeBSD:12:amd64/quarterly/ built from:
  - https://svnweb.freebsd.org/ports/branches/2020Q1/
  OR
  - https://svnweb.freebsd.org/ports/branches/2020Q2/
  ?

  I assume https://pkg.freebsd.org/FreeBSD:12:amd64/quarterly will have 
been rebuilt from https://svnweb.freebsd.org/ports/branches/2020Q2/.
  If so, when installing the new package:
  - Will I get any warning prompt about it?
  - Can I cancel the install without any changes being made?


  Thanks
  Michael.