$ git clone -n https://src.fedoraproject.org/rpms/R-IRkernel.git /var/lib/mock/f41-build-side-1-3142749-40009/root/chroot_tmpdir/scmroot/R-IRkernel
Cloning into '/var/lib/mock/f41-build-side-1-3142749-40009/root/chroot_tmpdir/scmroot/R-IRkernel'...
$ git fetch origin d8c0566eee0f7ba1912cd6053e151f2916b5ae9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-IRkernel
 * [new ref]         d8c0566eee0f7ba1912cd6053e151f2916b5ae9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8c0566 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild