$ git clone -n https://src.fedoraproject.org/rpms/R-utf8.git /var/lib/mock/f39-build-1979256-43339/root/chroot_tmpdir/scmroot/R-utf8
Cloning into '/var/lib/mock/f39-build-1979256-43339/root/chroot_tmpdir/scmroot/R-utf8'...
$ git fetch origin 040da398d738dd4b6bf75ca81e2fe8411984e30e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-utf8
 * [new ref]         040da398d738dd4b6bf75ca81e2fe8411984e30e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 040da39 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild