$ git clone -n https://src.fedoraproject.org/rpms/ghc-vector-space.git /var/lib/mock/f45-build-10949-425/root/chroot_tmpdir/scmroot/ghc-vector-space
Cloning into '/var/lib/mock/f45-build-10949-425/root/chroot_tmpdir/scmroot/ghc-vector-space'...
$ git fetch origin 94c7e3ea65a0cea110c18b34e6c3f07758771c0a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-vector-space
 * [new ref]         94c7e3ea65a0cea110c18b34e6c3f07758771c0a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94c7e3e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild