Right-back Hewitt has joined on a one-month loan deal from Ipswich to provide cover for Michael Harriman, who misses out this weekend due to his international commitments with the Republic of Ireland's Under-21 squad.
Forward Fagan, meanwhile, has signed for the Kent club on a free transfer ahead of what is Peter Taylor's first match since being confirmed as Gillingham's permanent manager on a deal until the end of the season.
Danny Hollands and Leon Legge are available having missed last weekend's 1-1 FA Cup draw against non-league Brackley, but midfielder Charlie Lee serves a one-match suspension while Amine Linganzi (hamstring) again misses out.
- Sports & Recreation
- Michael Harriman