$ git clone -n https://src.fedoraproject.org/rpms/gnome-break-timer.git /var/lib/mock/f39-build-1623823-38984/root/chroot_tmpdir/scmroot/gnome-break-timer
Cloning into '/var/lib/mock/f39-build-1623823-38984/root/chroot_tmpdir/scmroot/gnome-break-timer'...
$ git fetch origin 46c0f3d514087b91636d051f76c49b2cc180719c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-break-timer
 * [new ref]         46c0f3d514087b91636d051f76c49b2cc180719c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46c0f3d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild