$ git clone -n https://src.fedoraproject.org/rpms/rubygem-excon.git /var/lib/mock/f38-build-side-42-init-devel-638792-26386/root/chroot_tmpdir/scmroot/rubygem-excon
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-638792-26386/root/chroot_tmpdir/scmroot/rubygem-excon'...
$ git fetch origin 0015364e30c17b8f53b65de1d12ab6054642b7a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-excon
 * [new ref]         0015364e30c17b8f53b65de1d12ab6054642b7a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0015364 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild