$ git clone -n https://src.fedoraproject.org/rpms/ghc-prelude-extras.git /var/lib/mock/f45-build-10620-419/root/chroot_tmpdir/scmroot/ghc-prelude-extras
Cloning into '/var/lib/mock/f45-build-10620-419/root/chroot_tmpdir/scmroot/ghc-prelude-extras'...
$ git fetch origin 18f9c622030b5c4cdd2a6be800eded89d686906b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-prelude-extras
 * [new ref]         18f9c622030b5c4cdd2a6be800eded89d686906b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18f9c62 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild