$ git clone -n http://8.131.229.236/anolis-os/ghc /var/lib/mock/dist-an8-dep-build-17370-3063/root/chroot_tmpdir/scmroot/ghc
Cloning into '/var/lib/mock/dist-an8-dep-build-17370-3063/root/chroot_tmpdir/scmroot/ghc'...
$ git reset --hard origin/a8
HEAD is now at 91e644c import ghc-8.2.2-68.3.el8