$ git clone -n https://src.fedoraproject.org/rpms/ghc-dotgen.git /var/lib/mock/f31-build-111392-34159/root/chroot_tmpdir/scmroot/ghc-dotgen
Cloning into '/var/lib/mock/f31-build-111392-34159/root/chroot_tmpdir/scmroot/ghc-dotgen'...
$ git reset --hard 52ac405d494fd46d4032de4ec42c8f13cc50ca6f
HEAD is now at 52ac405 BR prof for lib and static for executable