$ git clone -n https://src.fedoraproject.org/rpms/R-qpdf.git /var/lib/mock/f40-build-2114773-50675/root/chroot_tmpdir/scmroot/R-qpdf
Cloning into '/var/lib/mock/f40-build-2114773-50675/root/chroot_tmpdir/scmroot/R-qpdf'...
$ git fetch origin 37ed2a986ba0787d09cc6387b52c0d6555155a9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-qpdf
 * [new ref]         37ed2a986ba0787d09cc6387b52c0d6555155a9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 37ed2a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild