$ git clone -n https://src.fedoraproject.org/rpms/R-yaml.git /var/lib/mock/f39-build-1496965-34580/root/chroot_tmpdir/scmroot/R-yaml
Cloning into '/var/lib/mock/f39-build-1496965-34580/root/chroot_tmpdir/scmroot/R-yaml'...
$ git fetch origin 549bbc4ab9587533b000afb014ca4ce4ed61a314:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-yaml
 * [new ref]         549bbc4ab9587533b000afb014ca4ce4ed61a314 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 549bbc4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild