Add the #oid{} record to differentiate from a formatted hash

src/geef_oid.erl

@@ -1,12 +1,14 @@
 -module(geef_oid).
 
+-include("geef_records.hlr").
 -export([parse/1, fmt/1]).
 
--spec fmt(binary()) -> binary().
-fmt(Oid) ->
+-spec fmt(oid()) -> binary().
+fmt(#oid{oid=Oid}) ->
     geef:oid_fmt(Oid).
 
 
--spec parse(binary()) -> binary().
+-spec parse(binary()) -> oid().
 parse(Sha) ->
-    geef:oid_parse(Sha).
+    Oid = geef:oid_parse(Sha),
+    #oid{oid=Oid}.