Use caching for new entries.

src/main.cpp

@@ -37,14 +37,14 @@ int main()
 {
     cout << "Content-Type: text/plain; charset=utf-8\r\n\r\n";
 
-    git::init();
+    git::init(true);
     gitea::init();
 
     try
     {
         const entry_type entry{cgi::parse_formdata()};
 
-        git::clone();
+        git::update_cached_repo();
         git::create_branch();
         git::commit(entry);
         git::push();
@@ -66,7 +66,7 @@ int main()
     }
 
     gitea::cleanup();
-    git::cleanup();
+    git::cleanup(true);
 
     return 0;
 }