$ git clone -n https://src.fedoraproject.org/rpms/ghc-memory.git /var/lib/mock/f31-build-111992-34238/root/chroot_tmpdir/scmroot/ghc-memory
Cloning into '/var/lib/mock/f31-build-111992-34238/root/chroot_tmpdir/scmroot/ghc-memory'...
$ git reset --hard 490a2de8d04125bb82b127992535d2146c2a95d8
HEAD is now at 490a2de BR prof for lib and static for executable