diff --git a/Library/Homebrew/utils/git.rb b/Library/Homebrew/utils/git.rb
index cc18fd12902b9f662272a1391265d2c0301f8e6a..5925a7b07f0168514a774fcd1b77ff53bc48dc63 100644
--- a/Library/Homebrew/utils/git.rb
+++ b/Library/Homebrew/utils/git.rb
@@ -94,6 +94,7 @@ module Utils
         begin
           oh1 "Installing #{Formatter.identifier("git")}"
           safe_system HOMEBREW_BREW_FILE, "install", "git"
+          clear_available_cache
         rescue
           raise "Git is unavailable"
         end