diff --git a/scriptbuilder/src/main/java/org/jclouds/scriptbuilder/domain/GitRepoAndRef.java b/scriptbuilder/src/main/java/org/jclouds/scriptbuilder/domain/GitRepoAndRef.java
new file mode 100644
index 0000000000..c54cfb3404
--- /dev/null
+++ b/scriptbuilder/src/main/java/org/jclouds/scriptbuilder/domain/GitRepoAndRef.java
@@ -0,0 +1,156 @@
+/**
+ * Licensed to jclouds, Inc. (jclouds) under one or more
+ * contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  jclouds licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.jclouds.scriptbuilder.domain;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.net.URI;
+
+import com.google.common.base.Objects;
+import com.google.common.base.Optional;
+
+/**
+ * Description of git coordinates to checkout.
+ * 
+ * @author Adrian Cole
+ */
+public class GitRepoAndRef  {
+
+   public static Builder builder() {
+      return new Builder();
+   }
+
+   public Builder toBuilder() {
+      return new Builder().fromGitRepoAndRef(this);
+   }
+
+   public static class Builder {
+
+      protected URI repository;
+      protected Optional<String> branch = Optional.absent();
+      protected Optional<String> tag = Optional.absent();
+
+      /**
+       * @see GitRepoAndRef#getRepository()
+       */
+      public Builder repository(URI repository) {
+         this.repository = repository;
+         return this;
+      }
+
+      /**
+       * @see GitRepoAndRef#getRepository()
+       */
+      public Builder repository(String repository) {
+         return repository(URI.create(repository));
+      }
+
+      /**
+       * @see GitRepoAndRef#getBranch()
+       */
+      public Builder branch(String branch) {
+         this.branch = Optional.fromNullable(branch);
+         return this;
+      }
+
+      /**
+       * @see GitRepoAndRef#getTag()
+       */
+      public Builder tag(String tag) {
+         this.tag = Optional.fromNullable(tag);
+         return this;
+      }
+
+      public GitRepoAndRef build() {
+         return new GitRepoAndRef(repository, branch, tag);
+      }
+
+      public Builder fromGitRepoAndRef(GitRepoAndRef in) {
+         return this.repository(in.getRepository()).branch(in.getBranch().orNull()).tag(in.getTag().orNull());
+      }
+   }
+
+   protected final URI repository;
+   protected final Optional<String> branch;
+   protected final Optional<String> tag;
+
+   protected GitRepoAndRef(URI repository, Optional<String> branch, Optional<String> tag) {
+      this.repository = checkNotNull(repository, "repository");
+      this.branch = checkNotNull(branch, "branch");
+      this.tag = checkNotNull(tag, "tag");
+   }
+
+   /**
+    * The (possibly remote) repository to clone from.
+    */
+   public URI getRepository() {
+      return repository;
+   }
+
+   /**
+    * Instead of pointing the newly created HEAD to the branch pointed to by the cloned repository's
+    * HEAD, point to this branch instead. In a non-bare repository, this is the branch that will be
+    * checked out.
+    */
+   public Optional<String> getBranch() {
+      return branch;
+   }
+
+   /**
+    * checkout the following tag on the branch
+    */
+   public Optional<String> getTag() {
+      return tag;
+   }
+
+   /**
+    * {@inheritDoc}
+    */
+   @Override
+   public int hashCode() {
+      return Objects.hashCode(repository, branch, tag);
+   }
+
+   /**
+    * {@inheritDoc}
+    */
+   @Override
+   public boolean equals(Object obj) {
+      if (this == obj)
+         return true;
+      if (obj == null)
+         return false;
+      if (getClass() != obj.getClass())
+         return false;
+      GitRepoAndRef other = GitRepoAndRef.class.cast(obj);
+      return Objects.equal(this.repository, other.repository) && Objects.equal(this.branch, other.branch)
+               && Objects.equal(this.tag, other.tag);
+   }
+
+
+   /**
+    * {@inheritDoc}
+    */
+   @Override
+   public String toString() {
+      return Objects.toStringHelper(this).omitNullValues().add("repository", repository).add("branch", branch.orNull())
+               .add("tag", tag.orNull()).toString();
+   }
+
+}