$ git clone -n https://src.fedoraproject.org/rpms/R-bitops.git /var/lib/mock/f45-build-5988-345/root/chroot_tmpdir/scmroot/R-bitops
Cloning into '/var/lib/mock/f45-build-5988-345/root/chroot_tmpdir/scmroot/R-bitops'...
$ git fetch origin 352000de8be071915e90380313c7d8b03c30c0e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-bitops
 * [new ref]         352000de8be071915e90380313c7d8b03c30c0e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 352000d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild