homebrew - git installed by brew cannot replace the old version in the system
Last login: Mon Mar 27 22:49:21 on ttys000
Moers-MacBook-Pro:~ apple$ which git
/usr/bin/git
Moers-MacBook-Pro:~ apple$ git version
git version 2.10.1 (Apple Git-78)
Moers-MacBook-Pro:~ apple$