$ git clone -n https://src.fedoraproject.org/rpms/R-testthat.git /var/lib/mock/f40-build-789229-135686/root/chroot_tmpdir/scmroot/R-testthat
Cloning into '/var/lib/mock/f40-build-789229-135686/root/chroot_tmpdir/scmroot/R-testthat'...
$ git fetch origin 940194db752f6212854145ce89d9d152667c0a1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-testthat
 * [new ref]         940194db752f6212854145ce89d9d152667c0a1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 940194d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild