$ git clone -n https://src.fedoraproject.org/rpms/ghc-hspec-discover.git /var/lib/mock/f45-build-10410-416/root/chroot_tmpdir/scmroot/ghc-hspec-discover
Cloning into '/var/lib/mock/f45-build-10410-416/root/chroot_tmpdir/scmroot/ghc-hspec-discover'...
$ git fetch origin fcd988e8cb47080616c72a58bba2b4463b3c0167:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hspec-discover
 * [new ref]         fcd988e8cb47080616c72a58bba2b4463b3c0167 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fcd988e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild