$ git clone -n https://src.fedoraproject.org/rpms/ghc-date-cache.git /var/lib/mock/f31-build-116183-34535/root/chroot_tmpdir/scmroot/ghc-date-cache
Cloning into '/var/lib/mock/f31-build-116183-34535/root/chroot_tmpdir/scmroot/ghc-date-cache'...
$ git reset --hard 539a6a687d4035257e56f9a3d84722e5b8fc5b22
HEAD is now at 539a6a6 BR prof for lib and static for executable