$ git clone -n https://src.fedoraproject.org/rpms/R-pbdZMQ.git /var/lib/mock/f40-build-2270253-54799/root/chroot_tmpdir/scmroot/R-pbdZMQ
Cloning into '/var/lib/mock/f40-build-2270253-54799/root/chroot_tmpdir/scmroot/R-pbdZMQ'...
$ git fetch origin 300a983993518334213966cdfcf7d2bd83ab4428:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-pbdZMQ
 * [new ref]         300a983993518334213966cdfcf7d2bd83ab4428 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 300a983 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild