$ git clone -n https://src.fedoraproject.org/rpms/ghc-contravariant.git /var/lib/mock/f45-build-10127-413/root/chroot_tmpdir/scmroot/ghc-contravariant
Cloning into '/var/lib/mock/f45-build-10127-413/root/chroot_tmpdir/scmroot/ghc-contravariant'...
$ git fetch origin e0bfec3e0fa6c46b5b3e3427a2a1f8567523c77a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-contravariant
 * [new ref]         e0bfec3e0fa6c46b5b3e3427a2a1f8567523c77a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0bfec3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild