this is my brew config

```
HOMEBREW_VERSION: 3.0.10-23-g5e0b08d
ORIGIN: https://github.com/Homebrew/homebrew-core
HEAD: 5e0b08dd01bdce3523c7e095739641b6f33b902a
Last commit: 6 hours ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 5e0b08dd01bdce3523c7e095739641b6f33b902a
Core tap last commit: 6 hours ago
Core tap branch: master
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 4
Homebrew Ruby: 2.6.3 => /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.6.3_2/bin/ruby
CPU: quad-core 64-bit icelake
Clang: 12.0 build 1200
Git: 2.24.3 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 7.64.1 => /usr/bin/curl
macOS: 10.15.7-x86_64
CLT: 12.4.0.0.1.1610135815
Xcode: N/A

```

when I try to download something via brewing (for instance CAT)
terminal says "Updating Homebrew" and it takes forever

and brew doctor says

```
 "Warning: Suspicious https://github.com/Homebrew/brew git origin remote found.
The current git origin is:
  https://github.com/Homebrew/homebrew-core

With a non-standard origin, Homebrew won't update properly.
You can solve this by setting the origin remote:
  git -C "/usr/local/Homebrew" remote set-url origin https://github.com/Homebrew/brew"

```

so I typed

```
git -C "/usr/local/Homebrew" remote set-url origin https://github.com/Homebrew/brew
 However, nothing happened

```

I am so frustrated from this. anyone can help?

Sorry for bad writing, English is not my mother-language :(