$ git clone -n https://src.fedoraproject.org/rpms/ghc-syb.git /var/lib/mock/f31-build-117017-34599/root/chroot_tmpdir/scmroot/ghc-syb
Cloning into '/var/lib/mock/f31-build-117017-34599/root/chroot_tmpdir/scmroot/ghc-syb'...
$ git reset --hard b64bfad2124ab2b319f5e683c84b35774e819a11
HEAD is now at b64bfad BR prof for lib and static for executable