Homebrew >=2.6.1 で brew update に失敗したメモ(GitHub からの shallow clone 禁止)MacMacOSXhomebrew % brew upgrade Error: homebrew-core is a shallow clone. To `brew update` first run: git -C "/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core" fetch --unshallow This restriction has been made on GitHub's request because updating shallow clones is an extremely expensive operation due to the tree layout and tr