$ git clone -n https://src.fedoraproject.org/rpms/rubygem-color.git /var/lib/mock/f39-build-1458116-33038/root/chroot_tmpdir/scmroot/rubygem-color
Cloning into '/var/lib/mock/f39-build-1458116-33038/root/chroot_tmpdir/scmroot/rubygem-color'...
$ git fetch origin c160894af96736f871cf6bbfa0dba8653aa82e39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-color
 * [new ref]         c160894af96736f871cf6bbfa0dba8653aa82e39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c160894 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild