$ git clone -n https://src.fedoraproject.org/rpms/R-pkgload.git /var/lib/mock/f40-build-2678658-67922/root/chroot_tmpdir/scmroot/R-pkgload
Cloning into '/var/lib/mock/f40-build-2678658-67922/root/chroot_tmpdir/scmroot/R-pkgload'...
$ git fetch origin ad881306d29f5159d44b1fd1333aeb28ce820848:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-pkgload
 * [new ref]         ad881306d29f5159d44b1fd1333aeb28ce820848 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad88130 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild