$ git clone -n https://src.fedoraproject.org/rpms/ghc-torrent.git /var/lib/mock/f31-build-117046-34599/root/chroot_tmpdir/scmroot/ghc-torrent
Cloning into '/var/lib/mock/f31-build-117046-34599/root/chroot_tmpdir/scmroot/ghc-torrent'...
$ git reset --hard dcaa3c96848be1a8084806a46742f06e776f8e2b
HEAD is now at dcaa3c9 BR prof for lib and static for executable