$ git clone -n https://src.fedoraproject.org/rpms/rubygem-unicode.git /var/lib/mock/f39-build-1499435-34744/root/chroot_tmpdir/scmroot/rubygem-unicode
Cloning into '/var/lib/mock/f39-build-1499435-34744/root/chroot_tmpdir/scmroot/rubygem-unicode'...
$ git fetch origin d04d9e6828af04b3af8e41134fe5a343179125c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-unicode
 * [new ref]         d04d9e6828af04b3af8e41134fe5a343179125c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d04d9e6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild