$ git clone -n https://src.fedoraproject.org/rpms/ghc-cborg-json.git /var/lib/mock/f45-build-10092-413/root/chroot_tmpdir/scmroot/ghc-cborg-json
Cloning into '/var/lib/mock/f45-build-10092-413/root/chroot_tmpdir/scmroot/ghc-cborg-json'...
$ git fetch origin 32d27c585b6a88a3b7d67f8a16163d5de98ac3b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cborg-json
 * [new ref]         32d27c585b6a88a3b7d67f8a16163d5de98ac3b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 32d27c5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild