thodg/got

diff --git a/got/got.1 b/got/got.1
index 5621370..696414b 100644
--- a/got/got.1
+++ b/got/got.1
@@ -184,6 +184,8 @@ within.
 If any objects in the pack file are stored in deltified form, all deltas will
 be fully resolved in order to compute the ID of such objects.
 This can take some time.
+More details about the pack file format are documented in
+.Xr git-repository 5 .
 .Pp
 .Cm got clone
 creates a remote repository entry in the