$ git clone -n https://src.fedoraproject.org/rpms/R-futile.logger.git /var/lib/mock/f45-build-6108-346/root/chroot_tmpdir/scmroot/R-futile.logger
Cloning into '/var/lib/mock/f45-build-6108-346/root/chroot_tmpdir/scmroot/R-futile.logger'...
$ git fetch origin 700fe8b6ae7c1983e4f116236b2dd254e6c62b29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-futile.logger
 * [new ref]         700fe8b6ae7c1983e4f116236b2dd254e6c62b29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 700fe8b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild