$ git clone -n https://src.fedoraproject.org/rpms/R-pkgbuild.git /var/lib/mock/f40-build-2304947-57052/root/chroot_tmpdir/scmroot/R-pkgbuild
Cloning into '/var/lib/mock/f40-build-2304947-57052/root/chroot_tmpdir/scmroot/R-pkgbuild'...
$ git fetch origin 5a370c96ed3d8b7af3a0fa31ad9dd9a3d4973621:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-pkgbuild
 * [new ref]         5a370c96ed3d8b7af3a0fa31ad9dd9a3d4973621 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a370c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild