Questions about these lyrics.

This is a song from Granger Smith called “Where I get it from”, I just have some questions about the lyrics, that I dont understand. Thanks!

[quote]Grandaddy used to chew Redman, cuss and crack open that cold beer can.

He loved the flag, he cranked up the Hag, and threw the empties on the floorboard.

Mama had Jesus on speed dial, had a heart wide as a county mile, thank God she prayed every night and day, that’s how I made it this far!
[/quote]

My questions are...

1. What does “redman” mean?
2. What does “the hag” mean?
3. What does “a country mile” mean?