$ git clone -n https://src.fedoraproject.org/rpms/sil-gentium-fonts.git /var/lib/mock/f39-build-1491743-34522/root/chroot_tmpdir/scmroot/sil-gentium-fonts
Cloning into '/var/lib/mock/f39-build-1491743-34522/root/chroot_tmpdir/scmroot/sil-gentium-fonts'...
$ git fetch origin e96895dbd0d65efaa35c08be30f290a0644ec02e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sil-gentium-fonts
 * [new ref]         e96895dbd0d65efaa35c08be30f290a0644ec02e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e96895d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild