gitview is an hex/ascii file viewer. Too simple to need a separate manual page. Use the arrows, PageUp, PageDown, Home, End, ^N, ^P, ^V, ESC v to move in the file, ^L to refresh the screen and F10 or ^G to leave. You can change those keys, just read the sections [GITVIEW-Setup], [GITVIEW-Color], [GITVIEW-Monochrome] and [GITVIEW-Keys] in the configuration file .gitrc.TERM.
See section Configuration Files, See section git, See section gitps, See section gitcmp, See section gitkeys, See section gitmount, See section gitredir, See section gitmatch, See section gitaction, See section .gitaction.