$ git clone -n https://src.fedoraproject.org/rpms/R-XML.git /var/lib/mock/f40-build-2271688-54891/root/chroot_tmpdir/scmroot/R-XML
Cloning into '/var/lib/mock/f40-build-2271688-54891/root/chroot_tmpdir/scmroot/R-XML'...
$ git fetch origin c4962f47191889b1ac89f27dd29b5b3479a69685:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-XML
 * [new ref]         c4962f47191889b1ac89f27dd29b5b3479a69685 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4962f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild