Added in fallback to fetch everything if we can't find a specific obj…

…ect.

src/lpm.c

@@ -483,12 +483,12 @@ static int lpm_fetch(lua_State* L) {
     git_repository_free(repository);
     return luaL_error(L, "git remote fetch error: %s", git_error_last_string());
   }
-  const char* refspec = lua_gettop(L) >= 3 ? luaL_checkstring(L, 3) : NULL;
+  const char* refspec = luaL_optstring(L, 3, NULL);
   git_fetch_options fetch_opts = GIT_FETCH_OPTIONS_INIT;
   fetch_opts.download_tags = GIT_REMOTE_DOWNLOAD_TAGS_ALL;
   fetch_opts.callbacks.payload = L;
   #if (LIBGIT2_VER_MAJOR == 1 && LIBGIT2_VER_MINOR >= 7) || LIBGIT2_VER_MAJOR > 1
-    fetch_opts.depth = 1;
+  fetch_opts.depth = lua_toboolean(L, 4) ? GIT_FETCH_DEPTH_FULL : 1;
   #endif
   if (no_verify_ssl)
     fetch_opts.callbacks.certificate_check = lpm_git_transport_certificate_check_cb;

src/lpm.lua

@@ -1262,10 +1262,11 @@ function Repository:fetch()
       end
       if not exists or self.branch then
         log.progress_action("Fetching " .. self.remote .. ":" .. (self.commit or self.branch) .. "...")
-        if self.commit then
-          system.fetch(temporary_path or path, write_progress_bar, self.commit)
-        elseif self.branch then
-          system.fetch(temporary_path or path, write_progress_bar, "+refs/heads/" .. self.branch  .. ":refs/remotes/origin/" .. self.branch)
+        local status, err = pcall(system.fetch, temporary_path or path, write_progress_bar, self.commit or ("+refs/heads/" .. self.branch  .. ":refs/remotes/origin/" .. self.branch))
+        if not status and err:find("cannot fetch a specific object") then
+          system.fetch(temporary_path or path, write_progress_bar, nil, true)
+        elseif not status then
+          error(err, 0)
         end
         common.reset(temporary_path or path, self.commit or self.branch, "hard")
       end