$ git clone -n https://src.fedoraproject.org/rpms/ghc-gtk3.git /var/lib/mock/f33-build-160865-43420/root/chroot_tmpdir/scmroot/ghc-gtk3
Cloning into '/var/lib/mock/f33-build-160865-43420/root/chroot_tmpdir/scmroot/ghc-gtk3'...
$ git reset --hard b4256d15aff215aca9b9f066d571dd88f89c5ad2
HEAD is now at b4256d1 update to 0.15.4