$ git clone -n https://src.fedoraproject.org/rpms/R-xtable.git /var/lib/mock/f38-build-side-42-init-devel-879158-28483/root/chroot_tmpdir/scmroot/R-xtable
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-879158-28483/root/chroot_tmpdir/scmroot/R-xtable'...
$ git fetch origin ad2c4b0e57e5540a0a5c08153d2d7ed36f4fff91:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-xtable
 * [new ref]         ad2c4b0e57e5540a0a5c08153d2d7ed36f4fff91 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad2c4b0 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild