GFF to FASTA - Problems Converting Files

Hi All,

I have recently the following file from ensembl to use as a reference genome for quantifying RNA-seq transcripts via Kallisto; Homo_sapiens.GRCh38.83.chr.gtf.gz

Once I have uploaded this file to the galaxy server the file as read as a GFF file. For kallisto quantification I need to have this file as a FASTA file. How would I be able to convert from the GFF format to FASTA