-A pack is a collection of objects, individually compressed, with delta
-compression applied, stored in a single file, with an associated index file.
+This script is used to combine all objects that do not currently
+reside in a "pack", into a pack.
+
+A pack is a collection of objects, individually compressed, with
+delta compression applied, stored in a single file, with an
+associated index file.
+
+Packs are used to reduce the load on mirror systems, backup
+engines, disk storage, etc.
+
+OPTIONS
+-------
+
+-a::
+ Instead of incrementally packing the unpacked objects,
+ pack everything available into a single pack.
+ Especially useful when packing a repository that is used
+ for a private development and there no need to worry
+ about people fetching via dumb protocols from it. Use
+ with '-d'.
+
+-d::
+ After packing, if the newly created packs make some
+ existing packs redundant, remove the redundant packs.