$ git clone -n https://src.fedoraproject.org/rpms/R-sourcetools.git /var/lib/mock/f40-build-789220-135686/root/chroot_tmpdir/scmroot/R-sourcetools
Cloning into '/var/lib/mock/f40-build-789220-135686/root/chroot_tmpdir/scmroot/R-sourcetools'...
$ git fetch origin 808663c56798c9584b56e84797d13e1e884937d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-sourcetools
 * [new ref]         808663c56798c9584b56e84797d13e1e884937d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 808663c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild