with `-b` or `repack.writeBitmaps`, as it ensures that the
bitmapped packfile has the necessary objects.
+--unpack-unreachable=<when>::
+ When loosening unreachable objects, do not bother loosening any
+ objects older than `<when>`. This can be used to optimize out
+ the write of any objects that would be immediately pruned by
+ a follow-up `git prune`.
+
Configuration
-------------