$ git clone -n https://src.fedoraproject.org/rpms/python-sphinxtesters.git /var/lib/mock/f45-build-33142-667/root/chroot_tmpdir/scmroot/python-sphinxtesters
Cloning into '/var/lib/mock/f45-build-33142-667/root/chroot_tmpdir/scmroot/python-sphinxtesters'...
$ git fetch origin 4b77dfb57e81a1716958e7d6e9869cd82d9dcad9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sphinxtesters
 * [new ref]         4b77dfb57e81a1716958e7d6e9869cd82d9dcad9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b77dfb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild