The world-famous UFC fighter Conor McGregor is gearing up for his fight with Khabib Nurmagomedov this October 6 but will he play his usual song and do his fans know the meaning of “The Foggy Dew”?

The song that will pipe him in will be the “Foggy Dew,” which is about the rebellion of 1916 that began the end of British rule in southern Ireland.

The version used by McGregor was sung by Sinead O’Connor and the accompanying video shows IRA men attacking a British convoy and the execution of the 1916 leaders.

McGregor has made no bones about being a strong Irish nationalist and a fluent Irish speaker.

"The Foggy Dew" gets played during his entrance for his fights and has had a clear impact on fans.

Evening Herald columnist Eamonn Carr wrote last year that “Fans who've attended Conor McGregor's big fights in Las Vegas tell of the spine-tingling effect 'The Foggy Dew' had on all present as it signaled the Dubliner's march to combat.”

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The song, written by Father Charles O’Neill, chronicles the Easter Uprising of 1916 and encourages Irishmen to fight for the cause of Ireland, rather than for the British, as so many young men were doing in World War I.

Now it has become a huge rallying crew for McGregor fans all over the world.

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