$ git clone -n https://src.fedoraproject.org/rpms/ghc-bytestring-nums.git /var/lib/mock/f31-build-115870-34523/root/chroot_tmpdir/scmroot/ghc-bytestring-nums
Cloning into '/var/lib/mock/f31-build-115870-34523/root/chroot_tmpdir/scmroot/ghc-bytestring-nums'...
$ git reset --hard b9b4bb4cc04a16722c7a25ee5680faae1af0d5cc
HEAD is now at b9b4bb4 BR prof for lib and static for executable