GetMergeRequest.
        [Preview API] Get a specific merge operation's details.
        :param str project: Project ID or project name
        :param str repository_name_or_id: The name or ID of the repository.
        :param int merge_operation_id: OperationId of the merge request.
        :param bool include_links: True to include links
        :rtype: :class:`<GitMerge> <azure.devops.v5_1.git.models.GitMerge>`

def get_merge_request(self, project, repository_name_or_id, merge_operation_id, include_links=None):
        """GetMergeRequest.
        [Preview API] Get a specific merge operation's details.
        :param str project: Project ID or project name
        :param str repository_name_or_id: The name or ID of the repository.
        :param int merge_operation_id: OperationId of the merge request.
        :param bool include_links: True to include links
        :rtype: :class:`<GitMerge> <azure.devops.v5_1.git.models.GitMerge>`
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if repository_name_or_id is not None:
            route_values['repositoryNameOrId'] = self._serialize.url('repository_name_or_id', repository_name_or_id, 'str')
        if merge_operation_id is not None:
            route_values['mergeOperationId'] = self._serialize.url('merge_operation_id', merge_operation_id, 'int')
        query_parameters = {}
        if include_links is not None:
            query_parameters['includeLinks'] = self._serialize.query('include_links', include_links, 'bool')
        response = self._send(http_method='GET',
                              location_id='985f7ae9-844f-4906-9897-7ef41516c0e2',
                              version='5.1-preview.1',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('GitMerge', response)