This song, written by Neil Diamond and performed by The Monkees was their best one, I thought. It is the ideal song, at least the title phrase, for those occasions when one is cheering for one’s preferred team, especially when it is the underdog and fighting back. I don’t go to any sporting events so don’t know if it is actually used for that purpose.
The group Smash Mouth did a cover of the song that was used in the film Shrek, one of the few occasions when a good song had an equally good, or even better, cover version. This was because they did not change it that much but simply amped it up and gave it a slightly harder edge.