$ git clone -n https://src.fedoraproject.org/rpms/sil-gentium-plus-fonts.git /var/lib/mock/f39-build-1767045-41501/root/chroot_tmpdir/scmroot/sil-gentium-plus-fonts
Cloning into '/var/lib/mock/f39-build-1767045-41501/root/chroot_tmpdir/scmroot/sil-gentium-plus-fonts'...
$ git fetch origin c1d5579da29db635fc2a20ead4aee9deae567061:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sil-gentium-plus-fonts
 * [new ref]         c1d5579da29db635fc2a20ead4aee9deae567061 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1d5579 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild