$ git clone -n https://src.fedoraproject.org/rpms/R-withr.git /var/lib/mock/f38-build-side-42-init-devel-981981-29038/root/chroot_tmpdir/scmroot/R-withr
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-981981-29038/root/chroot_tmpdir/scmroot/R-withr'...
$ git fetch origin 19ea5e498ac9ccdcea5d18de7d645b9de81c735e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-withr
 * [new ref]         19ea5e498ac9ccdcea5d18de7d645b9de81c735e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19ea5e4 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild