$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ammeter.git /var/lib/mock/f40-build-2053394-49093/root/chroot_tmpdir/scmroot/rubygem-ammeter
Cloning into '/var/lib/mock/f40-build-2053394-49093/root/chroot_tmpdir/scmroot/rubygem-ammeter'...
$ git fetch origin 29b4c98667ac87564b0268d3c62c08cdb612ff4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-ammeter
 * [new ref]         29b4c98667ac87564b0268d3c62c08cdb612ff4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29b4c98 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild