The 24-year-old has not featured for the Championship outfit for almost a month.
After only one goal in his nine appearances for the Robins, manager Keith Millen will not be looking to bring the Republic of Ireland international back to Ashton Gate on a permanent deal in the summer.
However, City have not given any indication whether Keogh could return to the club before the end of the season.
"When you look at the types of forward we've got he's quite similar," Millen told BBC Radio Bristol.
"I'm looking to get a balance to the squad and have different options in different areas."
Source: PA
Source: PA