fix: 500 on bad url

lib/git_remote.rb

@@ -8,7 +8,11 @@
     # Only allow safe protocols
     return false unless repo_url.match?(/\A(https?|git|ssh):\/\//)
 
-    safe_repo_url = URI.parse(repo_url).to_s.gsub(" ", "").gsub("'", "")
-    Open3.capture2e("git", "ls-remote", safe_repo_url).last.success?
+    safe_repo_url = URI.parse(repo_url).to_s.gsub(" ", "").gsub("'", "") rescue (return false)
+
+    Open3.capture2e(
+      {"GIT_CURL_TIMEOUT"=>"15","GIT_HTTP_LOW_SPEED_LIMIT"=>"1000","GIT_HTTP_LOW_SPEED_TIME"=>"15","GIT_HTTP_MAX_REQUESTS"=>"5"},
+      "git","ls-remote","--",safe_repo_url
+    ).last.success?
   end
 end