Please use https://download.fedoraproject.org/pub/fedora-secondary/releases/27/Docker/aarch64/images/Fedora-Docker-Base-27-1.6.aarch64.tar.xz for aarch64.
Without it, I get weird issues such as the following:
Error: Transaction check error:
file /usr/bin/ldd from install of glibc-common-2.26-24.fc27.aarch64 conflicts with file from package glibc-common-2.26-15.fc27.armv7hl
Please use
https://download.fedoraproject.org/pub/fedora-secondary/releases/27/Docker/aarch64/images/Fedora-Docker-Base-27-1.6.aarch64.tar.xzforaarch64.Without it, I get weird issues such as the following: