$ git clone -n https://src.fedoraproject.org/rpms/rubygem-nenv.git /var/lib/mock/f40-build-2034036-47862/root/chroot_tmpdir/scmroot/rubygem-nenv
Cloning into '/var/lib/mock/f40-build-2034036-47862/root/chroot_tmpdir/scmroot/rubygem-nenv'...
$ git fetch origin a45e0d3016809a298c4c7c239038a0813d4d3a24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-nenv
 * [new ref]         a45e0d3016809a298c4c7c239038a0813d4d3a24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a45e0d3 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild