$ git clone -n https://src.fedoraproject.org/rpms/ghc-hourglass.git /var/lib/mock/f41-build-837627-159296/root/chroot_tmpdir/scmroot/ghc-hourglass
Cloning into '/var/lib/mock/f41-build-837627-159296/root/chroot_tmpdir/scmroot/ghc-hourglass'...
$ git reset --hard 6b1ebf5aa94df9aecb605bf56d30e22b9d731d87
HEAD is now at 6b1ebf5 revise .cabal file