diff --git a/Library/Homebrew/cmd/update-bash.sh b/Library/Homebrew/cmd/update-bash.sh
index bcc721bbca..f75abb614b 100644
--- a/Library/Homebrew/cmd/update-bash.sh
+++ b/Library/Homebrew/cmd/update-bash.sh
@@ -303,6 +303,9 @@ EOS
       odie "Git must be installed and in your PATH!"
     fi
   fi
+  export GIT_TERMINAL_PROMPT="0"
+  export GIT_ASKPASS="false"
+  export GIT_SSH_COMMAND="ssh -oBatchMode=yes"
 
   if [[ -z "$HOMEBREW_VERBOSE" ]]
   then