$ git clone -n https://src.fedoraproject.org/rpms/R-yaml.git /var/lib/mock/f40-build-789258-135692/root/chroot_tmpdir/scmroot/R-yaml
Cloning into '/var/lib/mock/f40-build-789258-135692/root/chroot_tmpdir/scmroot/R-yaml'...
$ git fetch origin db7afd4c16f9a8b7b72cb2b0bd7417cdf41dcd5e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-yaml
 * [new ref]         db7afd4c16f9a8b7b72cb2b0bd7417cdf41dcd5e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db7afd4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild