How to switch to a new version of git on mac OS?

Question

git

Hello! Please tell me how to switch to git installed via homebrew on a poppy.
I tried to write $ sudo mv /usr/bin/git /usr/bin/git-applein response received

mv: rename /usr/bin/git to /usr/bin/git-apple: Operation not permitted

$ brew upgrade git
Updating Homebrew...
==> Homebrew is run entirely by unpaid volunteers. Please consider donating:
  https://github.com/Homebrew/brew#donations
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
==> Updated Formulae
Updated 3 formulae.

Warning: git 2.30.0 already installed

$ git --version
git version 2.19.2

Answer 1

1. Type
open ~/.bash_profile in the terminal
2. In the window that opens, add the line
export PATH="/usr/local/bin:${PATH}"
Save and close
3. Type
source ~/.bash_profile in the terminal
Hooray, the version has changed !

Answer 2

Put in PATH so that the OS finds the new version before the old one.

Answer 3

Why is the version still the same?