Fix a few references to changed function signatures

examples/network/fetch.c

@@ -156,7 +156,7 @@ int fetch(git_repository *repo, int argc, char **argv)
 	// right commits. This may be needed even if there was no packfile
 	// to download, which can happen e.g. when the branches have been
 	// changed but all the neede objects are available locally.
-	if (git_remote_update_tips(remote) < 0)
+	if (git_remote_update_tips(remote, NULL, NULL) < 0)
 		return -1;
 
 	git_remote_free(remote);

tests/merge/workdir/dirty.c

@@ -183,7 +183,7 @@ static void stage_content(char *content[])
 
 	cl_git_pass(git_repository_head(&head, repo));
 	cl_git_pass(git_reference_peel(&head_object, head, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD));
+	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL, NULL));
 
 	for (i = 0, filename = content[i], text = content[++i];
 		filename && text;
@@ -212,7 +212,7 @@ static int merge_dirty_files(char *dirty_files[])
 
 	cl_git_pass(git_repository_head(&head, repo));
 	cl_git_pass(git_reference_peel(&head_object, head, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD));
+	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL, NULL));
 
 	write_files(dirty_files);
 
@@ -234,7 +234,7 @@ static int merge_differently_filtered_files(char *files[])
 
 	cl_git_pass(git_repository_head(&head, repo));
 	cl_git_pass(git_reference_peel(&head_object, head, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD));
+	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL, NULL));
 
 	write_files(files);
 	hack_index(files);