$ git clone -n https://src.fedoraproject.org/rpms/ruby.git /var/lib/mock/f38-build-side-42-init-devel-573894-25952/root/chroot_tmpdir/scmroot/ruby
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-573894-25952/root/chroot_tmpdir/scmroot/ruby'...
$ git fetch origin 1d539d90eabcdfbf95b4d6ecfeacaf080c131af3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ruby
 * [new ref]         1d539d90eabcdfbf95b4d6ecfeacaf080c131af3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d539d9 Upgrade to Ruby 3.2.2.