$ git clone -n https://src.fedoraproject.org/rpms/ghc-json.git /var/lib/mock/f45-build-10472-418/root/chroot_tmpdir/scmroot/ghc-json
Cloning into '/var/lib/mock/f45-build-10472-418/root/chroot_tmpdir/scmroot/ghc-json'...
$ git fetch origin cc05269aea946308a697f16501b07c245d462acc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-json
 * [new ref]         cc05269aea946308a697f16501b07c245d462acc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc05269 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild