Cannot update Homebrew: git not detected properly

[SaladFork]

Trying to update:

$ brew update
Warning: git-2.8.1 already installed
Error: Git must be installed and in your PATH!

Doctor:

$ brew doctor
Your system is ready to brew.

Versions:

$ which -a git
git: aliased to hub
/usr/local/bin/git
/usr/bin/git

$ git --version
git version 2.8.1
hub version 2.2.3

$ /usr/local/bin/git --version
git version 2.8.1

$ /usr/bin/git --version
git version 2.7.4 (Apple Git-66)

$ brew --version
Homebrew 0.9.9 (git revision a02be; last commit 2016-07-15)
Homebrew/homebrew-core (git revision 34ac0; last commit 2016-04-19)

Ensuring brew is latest:

$ cd /usr/local
$ git remote -v
origin  https://github.com/Homebrew/brew.git (fetch)
origin  https://github.com/Homebrew/brew.git (push)

$ git fetch
$ git reset --hard origin/master
$ git log --pretty=medium | head -n 5
commit a02be9eea204264ce48827ac365c8b53b986d66a
Author: Mike McQuaid <mike@mikemcquaid.com>
Date:   Fri Jul 15 19:03:45 2016 +0100

    ENV: move to new paths. (#507)

[SaladFork]

Thanks! Gotta love my timing...

[DomT4]

You may need to:

cd $(brew --prefix) && git fetch && git reset --hard origin/master

To escape the error. Should only need doing once if brew update remains stuck.

[SaladFork]

Thanks again! I'm good now.

[MikeMcQuaid]

@SaladFork Out of interest: did you need to do that?

[SaladFork]

Oh no, hate to disappoint but I ran it prior to trying another update just to be sure.