$ git clone -n https://src.fedoraproject.org/rpms/ghc-yaml.git /var/lib/mock/f33-build-151119-43278/root/chroot_tmpdir/scmroot/ghc-yaml
Cloning into '/var/lib/mock/f33-build-151119-43278/root/chroot_tmpdir/scmroot/ghc-yaml'...
$ git reset --hard cc0f0e4fc325c7b5a1ec99bbe70f35730609e330
HEAD is now at cc0f0e4 update to 0.11.2.0