$ git clone -n https://src.fedoraproject.org/rpms/R-xml2.git /var/lib/mock/f38-build-side-42-init-devel-981982-29038/root/chroot_tmpdir/scmroot/R-xml2
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-981982-29038/root/chroot_tmpdir/scmroot/R-xml2'...
$ git fetch origin 9154350c028d25088fbc4d731cdf54c35d06a9e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-xml2
 * [new ref]         9154350c028d25088fbc4d731cdf54c35d06a9e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9154350 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild