$ git clone -n https://src.fedoraproject.org/rpms/massif-visualizer.git /var/lib/mock/f40-build-2278968-55300/root/chroot_tmpdir/scmroot/massif-visualizer
Cloning into '/var/lib/mock/f40-build-2278968-55300/root/chroot_tmpdir/scmroot/massif-visualizer'...
$ git fetch origin 42934c1a043f835306049fcd0dbe7844be406af8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/massif-visualizer
 * [new ref]         42934c1a043f835306049fcd0dbe7844be406af8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42934c1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild