$ git clone -n https://src.fedoraproject.org/rpms/R-utf8.git /var/lib/mock/f40-build-2270206-54796/root/chroot_tmpdir/scmroot/R-utf8
Cloning into '/var/lib/mock/f40-build-2270206-54796/root/chroot_tmpdir/scmroot/R-utf8'...
$ git fetch origin 426d5dc9813f5056726c44f7a8546406fedfcf98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-utf8
 * [new ref]         426d5dc9813f5056726c44f7a8546406fedfcf98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 426d5dc Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild