$ git clone -n https://src.fedoraproject.org/rpms/rubygem-coderay.git /var/lib/mock/f39-build-1499238-34744/root/chroot_tmpdir/scmroot/rubygem-coderay
Cloning into '/var/lib/mock/f39-build-1499238-34744/root/chroot_tmpdir/scmroot/rubygem-coderay'...
$ git fetch origin c2beb8b8f19ef38888f06c4a34f76e4dcc3c8164:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-coderay
 * [new ref]         c2beb8b8f19ef38888f06c4a34f76e4dcc3c8164 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2beb8b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild