$ git clone -n https://src.fedoraproject.org/rpms/ghc-mmorph.git /var/lib/mock/f45-build-10535-418/root/chroot_tmpdir/scmroot/ghc-mmorph
Cloning into '/var/lib/mock/f45-build-10535-418/root/chroot_tmpdir/scmroot/ghc-mmorph'...
$ git fetch origin 71f088b6fb726a5b2e2f2469d704e11d20d1d853:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-mmorph
 * [new ref]         71f088b6fb726a5b2e2f2469d704e11d20d1d853 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71f088b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild