There seem to have been words put to most bugle calls to remember what they were for.
We used to end wolf cub meetings with "Taps", memorised as:
"Day's done,
Gone the sun,
From the seas, from the hills, from the sky.
All is well,
Safely rest.
God is nigh"

And reveille was:
"Wakey wakey, rise and shakey,
Wakey wakey, get out of bed.
Get up you sleepy-heads,
Get out of bed."