$ git clone -n https://src.fedoraproject.org/rpms/R-qpdf.git /var/lib/mock/f40-build-789199-135678/root/chroot_tmpdir/scmroot/R-qpdf
Cloning into '/var/lib/mock/f40-build-789199-135678/root/chroot_tmpdir/scmroot/R-qpdf'...
$ git fetch origin 013f5e2d05b7a7cfa6b3fcbcb4f28ef4efa6f6dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-qpdf
 * [new ref]         013f5e2d05b7a7cfa6b3fcbcb4f28ef4efa6f6dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 013f5e2 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild