$ git clone -n https://src.fedoraproject.org/rpms/R-tidyr.git /var/lib/mock/f40-build-2175587-51067/root/chroot_tmpdir/scmroot/R-tidyr
Cloning into '/var/lib/mock/f40-build-2175587-51067/root/chroot_tmpdir/scmroot/R-tidyr'...
$ git fetch origin 934da1e0b14559044ef1275629bf695e5466fd8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-tidyr
 * [new ref]         934da1e0b14559044ef1275629bf695e5466fd8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 934da1e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild