$ git clone -n https://src.fedoraproject.org/rpms/R-lokern.git /var/lib/mock/f39-build-1496058-34546/root/chroot_tmpdir/scmroot/R-lokern
Cloning into '/var/lib/mock/f39-build-1496058-34546/root/chroot_tmpdir/scmroot/R-lokern'...
$ git fetch origin 8a395144644004ee4816b1fc0393a47f92965061:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-lokern
 * [new ref]         8a395144644004ee4816b1fc0393a47f92965061 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a39514 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild