git command was killed

Hello, 

I’d like to get your support to solve below issue. When I upgraded my MacBook Pro (appple silicon ) , all git commands can not be run, and it shows ******killed. I have tried to reset Xcode-select, switch the path, or install again..no luck to resolve it.

Please advise how I can solve this issue. 

shiyangliu@ShiyangdeMacBook-Pro  ~  git --version [1] 40011 killed git —version

Brew config results: 

 shiyangliu@ShiyangdeMacBook-Pro  ~  brew config
HOMEBREW_VERSION: >=2.5.0 (shallow or no git repository)
ORIGIN: (none)
HEAD: (none)
Last commit: never
Core tap ORIGIN: (none)
Core tap HEAD: (none)
Core tap last commit: never
Core tap branch: (none)
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 8
Homebrew Ruby: 2.6.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
CPU: octa-core 64-bit arm_firestorm_icestorm
clang: error: unable to find Xcode installation from active developer path "/Library/Developer/CommandlineTools", use xcode-select to change
Clang: N/A
Git: N/A
Curl: 7.64.1 => /usr/bin/curl
Java: 15.0.2
macOS: 11.2-arm64
CLT: 12.5.0.0.1.1611946261
Xcode: dunno => /Library/Developer/CommandlineTools
Rosetta 2: false

Shiyang