hg38 ftp ucsc
http://hgdownload.soe.ucsc.edu/goldenPath/hg38/bigZips/

http://hgdownload.soe.ucsc.edu/goldenPath/hg38/bigZips/hg38.chromFa.tar.gz

 

http://hgdownload.soe.ucsc.edu/goldenPath/hg38/bigZips/hg38.fa.gz