def ucsc_genome_conversion(genome_name):
    """Convert genome names to UCSC convention

    :Parameters:
        genome_name: str our genome names
    :Returns:
        str UCSC genome name
    """
    conversions = {
        'GRCh38': 'hg38',
    }
    if genome_name in conversions:
        return conversions[genome_name]
    else:
        return genome_name