$ git clone -n https://src.fedoraproject.org/rpms/paperwork.git /var/lib/mock/f45-build-21372-584/root/chroot_tmpdir/scmroot/paperwork
Cloning into '/var/lib/mock/f45-build-21372-584/root/chroot_tmpdir/scmroot/paperwork'...
$ git fetch origin 3cce03e821251fc8b0b7de9f05bf9591f3d6733c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/paperwork
 * [new ref]         3cce03e821251fc8b0b7de9f05bf9591f3d6733c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cce03e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild