$ git clone -n https://src.fedoraproject.org/rpms/ghc-js-chart.git /var/lib/mock/f45-build-10455-418/root/chroot_tmpdir/scmroot/ghc-js-chart
Cloning into '/var/lib/mock/f45-build-10455-418/root/chroot_tmpdir/scmroot/ghc-js-chart'...
$ git fetch origin 9a17a55b0db2392adb147c3c021ff6d74c33aae2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-js-chart
 * [new ref]         9a17a55b0db2392adb147c3c021ff6d74c33aae2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a17a55 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild