FetchCommand: allow to set "TagOpt"

This is needed for implementing Fetch in EGit using the API.

Change-Id: Ibdcc95906ef0f93e3798ae20d4de353fb394f2e2
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/api/FetchCommand.java

 import org.eclipse.jgit.transport.CredentialsProvider;
 import org.eclipse.jgit.transport.FetchResult;
 import org.eclipse.jgit.transport.RefSpec;
+import org.eclipse.jgit.transport.TagOpt;
 import org.eclipse.jgit.transport.Transport;
 
 /**
 
 	private CredentialsProvider credentialsProvider;
 
+	private TagOpt tagOption;
 
 	/**
 	 * @param repo
 			transport.setRemoveDeletedRefs(removeDeletedRefs);
 			transport.setTimeout(timeout);
 			transport.setDryRun(dryRun);
+			if (tagOption != null)
+				transport.setTagOpt(tagOption);
 			transport.setFetchThin(thin);
 			transport.setCredentialsProvider(credentialsProvider);
 
 		this.credentialsProvider = credentialsProvider;
 		return this;
 	}
+
+	/**
+	 * Sets the specification of annotated tag behavior during fetch
+	 *
+	 * @param tagOpt
+	 * @return {@code this}
+	 */
+	public FetchCommand setTagOpt(TagOpt tagOpt) {
+		checkCallable();
+		this.tagOption = tagOpt;
+		return this;
+	}
 }