$ git clone -n https://src.fedoraproject.org/rpms/gnome-font-viewer.git /var/lib/mock/f40-build-790352-136506/root/chroot_tmpdir/scmroot/gnome-font-viewer
Cloning into '/var/lib/mock/f40-build-790352-136506/root/chroot_tmpdir/scmroot/gnome-font-viewer'...
$ git fetch origin 48c234c37a4c699b1854cc4b112ccc165427bd1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-font-viewer
 * [new ref]         48c234c37a4c699b1854cc4b112ccc165427bd1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48c234c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild