diff --git a/reckon-core/src/main/java/org/ajoberstar/reckon/core/GitInventorySupplier.java b/reckon-core/src/main/java/org/ajoberstar/reckon/core/GitInventorySupplier.java
index 7956e355..10048f19 100644
--- a/reckon-core/src/main/java/org/ajoberstar/reckon/core/GitInventorySupplier.java
+++ b/reckon-core/src/main/java/org/ajoberstar/reckon/core/GitInventorySupplier.java
@@ -20,6 +20,7 @@
 import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.ObjectReader;
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
@@ -55,7 +56,7 @@ public GitInventorySupplier(Repository repo, Function<String, Optional<String>>
   @Override
   public VcsInventory getInventory() {
     // share this walk throughout to benefit from its caching
-    try (RevWalk walk = new RevWalk(repo)) {
+    try (ObjectReader reader = repo.newObjectReader(); RevWalk walk = new RevWalk(reader)) {
       // saves on some performance as we don't really need the commit bodys
       walk.setRetainBody(false);
 
@@ -94,7 +95,7 @@ public VcsInventory getInventory() {
       Set<Version> claimedVersions = taggedVersions.stream().map(TaggedVersion::getVersion).collect(Collectors.toSet());
 
       return new VcsInventory(
-          headObjectId.getName(),
+          reader.abbreviate(headObjectId).name(),
           isClean(),
           currentVersion,
           baseVersion.getVersion(),
diff --git a/reckon-core/src/test/groovy/org/ajoberstar/reckon/core/GitInventorySupplierTest.groovy b/reckon-core/src/test/groovy/org/ajoberstar/reckon/core/GitInventorySupplierTest.groovy
index 6a6a26b0..af7de832 100644
--- a/reckon-core/src/test/groovy/org/ajoberstar/reckon/core/GitInventorySupplierTest.groovy
+++ b/reckon-core/src/test/groovy/org/ajoberstar/reckon/core/GitInventorySupplierTest.groovy
@@ -15,6 +15,11 @@ class GitInventorySupplierTest extends Specification {
 
   GitInventorySupplier supplier
 
+  def 'commit id is abbreviated, not full'() {
+    expect:
+    supplier.getInventory().commitId == Optional.of(grgit.head().abbreviatedId)
+  }
+
   def 'if HEAD has no tagged versions, current version is empty'() {
     given:
     checkout('head-untagged')