I removed all default RSS links(<link> tags) from head, then I created new feed template. URL for new feed is like example.com/feed/newcustomfeed.

Now I want to add new <link> tag in the head section.

<link rel="alternate" type="application/rss+xml" title="My Site &raquo; My custom feed" href="https://example.com/feed/newcustomfeed">

Is there any function that puts link tag in the head section or do I have to add it manually using hook like wp_head?