diff --git a/lib/data-generators/git-tag-commit.js b/lib/data-generators/git-tag-commit.js
index cf2207b..97b5076 100644
--- a/lib/data-generators/git-tag-commit.js
+++ b/lib/data-generators/git-tag-commit.js
@@ -9,24 +9,33 @@ module.exports = CoreObject.extend({
   },
 
   generate: function() {
-    var commitHashLength = this._plugin.readConfig('commitHashLength');
-    var separator = this._plugin.readConfig('separator');
-    var info = gitRepoInfo();
+    var providedTag = this._plugin.readConfig('tag');
 
-    if (info === null || info.root === null) {
-      return RSVP.reject('Could not find git repository');
-    }
+    if (providedTag) {
+      return RSVP.resolve({
+        revisionKey: providedTag,
+        timestamp: new Date().toISOString()
+      });
+    } else {
+      var commitHashLength = this._plugin.readConfig('commitHashLength');
+      var separator = this._plugin.readConfig('separator');
+      var info = gitRepoInfo();
 
-    var tag = info.lastTag;
-    var sha = info.sha.slice(0, commitHashLength);
+      if (info === null || info.root === null) {
+        return RSVP.reject('Could not find git repository');
+      }
 
-    if (!tag || !sha) {
-      return RSVP.reject('Could not build revision with tag `' + tag + '` and commit hash `' + sha + '`');
-    }
+      var tag = info.lastTag;
+      var sha = info.sha.slice(0, commitHashLength);
 
-    return RSVP.resolve({
-      revisionKey: tag + separator + sha,
-      timestamp: new Date().toISOString()
-    });
+      if (!tag || !sha) {
+        return RSVP.reject('Could not build revision with tag `' + tag + '` and commit hash `' + sha + '`');
+      }
+
+      return RSVP.resolve({
+        revisionKey: tag + separator + sha,
+        timestamp: new Date().toISOString()
+      });
+    }
   }
 });