diff --git a/Git.hs b/Git.hs
--- a/Git.hs
+++ b/Git.hs
@@ -152,7 +152,9 @@
 
     facts :: m RepositoryFacts
 
-    parseOid  :: Text -> m (Oid m)
+    parseOid :: Text -> m (Oid m)
+    parseObjOid :: forall o. Text -> m (Tagged o (Oid m))
+    parseObjOid sha = Tagged <$> parseOid sha
 
     -- References
     createRef  :: Text -> RefTarget m (Commit m) -> m (Reference m (Commit m))
diff --git a/gitlib.cabal b/gitlib.cabal
--- a/gitlib.cabal
+++ b/gitlib.cabal
@@ -1,5 +1,5 @@
 Name:                gitlib
-Version:             1.2.0
+Version:             1.2.1
 Synopsis:            API library for working with Git repositories
 License-file:        LICENSE
 License:             MIT