-the set of commits which are no deeper than the desired depth, starting
-at the client's wants. The server writes 'shallow' lines for each
+the set of commits which are no deeper than the desired depth. The set
+of commits start at the client's wants.
+
+The server writes 'shallow' lines for each
commit whose parents will not be sent as a result. The server writes
an 'unshallow' line for each commit which the client has indicated is
shallow, but is no longer shallow at the currently requested depth
commit whose parents will not be sent as a result. The server writes
an 'unshallow' line for each commit which the client has indicated is
shallow, but is no longer shallow at the currently requested depth