-the contributing parent is taken to be
-the one with the later commit date,
-or if the commit dates are the same,
-the first parent.
-
-=item dgit dsc import
-
-Debian .dsc source package import(s) made by dgit.
-Each such import must be a two-parent pseudomerge
-whose contributing parent is in the special
-dgit format (not described further here).
-The overwritten parent must be
-the previous interchange tip.
-This is the form normally generated by dgit
-when it imports .dsc-based uploads.
+the one with the later commit date
+(or, if the commit dates are the same,
+the first parent)
+is treated as
+the contributing parent.
+
+=item dgit dsc import pseudomerge
+
+Debian .dsc source package import(s)
+made by dgit
+(during dgit fetch of a package most recently
+uploaded to Debian without dgit,
+or during dgit import-dsc).
+
+git-debrebase requires that
+each such import is in the fast-forwarding
+format produced by dgit:
+a two-parent pseudomerge,
+whose contributing parent is in the
+non-fast-forwarding
+dgit dsc import format (not described further here),
+and whose overwritten parent is
+the previous interchange tip
+(eg, the previous tip of the dgit suite branch).