$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ethon.git /var/lib/mock/f40-build-2207608-52086/root/chroot_tmpdir/scmroot/rubygem-ethon
Cloning into '/var/lib/mock/f40-build-2207608-52086/root/chroot_tmpdir/scmroot/rubygem-ethon'...
$ git fetch origin d3d5860f064e1d33a16639c02a273de1f36128aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-ethon
 * [new ref]         d3d5860f064e1d33a16639c02a273de1f36128aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3d5860 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild