Parallel Anthology Track 30
Track 30: Prince Albert Hunt's Texas Ramblers - Wake Up Jacob Okeh 45375; Recorded in Dallas, Texas, 26.6.1929
No image of record label available.
Neither Anthology booklet assigns authorship, nor does www.78discography.com.
Harry Smith's Anthology booklet calls this a "well known tune".
According to the Where Dead Voices Gather blog, "The song dates from the early to mid 19th century. Among its earliest published forms is in Old Dan Emmett’s Original Banjo Melodies (1844)."
There are good grounds for treating this composition as public domain.
Parallel anthology main index page
Alternative Versions
Wild Horse by The Kessinger Brothers recorded between 1928 and 1929 (according to album title): Spotify
The Wild Horse by Frank Hutchison recorded in 1927 (according to wikipedia): Spotify