$ git clone -n https://src.fedoraproject.org/rpms/ghc-date-cache.git /var/lib/mock/f45-build-10195-414/root/chroot_tmpdir/scmroot/ghc-date-cache
Cloning into '/var/lib/mock/f45-build-10195-414/root/chroot_tmpdir/scmroot/ghc-date-cache'...
$ git fetch origin 413d6182f2cc7e8acb202d8ef6e66ca4badda960:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-date-cache
 * [new ref]         413d6182f2cc7e8acb202d8ef6e66ca4badda960 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 413d618 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild