$ git clone -n https://src.fedoraproject.org/rpms/rubygem-rails-dom-testing.git /var/lib/mock/f40-build-2639294-66352/root/chroot_tmpdir/scmroot/rubygem-rails-dom-testing
Cloning into '/var/lib/mock/f40-build-2639294-66352/root/chroot_tmpdir/scmroot/rubygem-rails-dom-testing'...
$ git fetch origin 9030d87663e20108e224740c470e98fbed832b6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-rails-dom-testing
 * [new ref]         9030d87663e20108e224740c470e98fbed832b6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9030d87 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild