$ git clone -n https://src.fedoraproject.org/rpms/mkosi14.git /var/lib/mock/f40-build-2613344-64062/root/chroot_tmpdir/scmroot/mkosi14
Cloning into '/var/lib/mock/f40-build-2613344-64062/root/chroot_tmpdir/scmroot/mkosi14'...
$ git fetch origin 0c783ab239ff1d41c2cc79fed5c5cd2286fea79b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mkosi14
 * [new ref]         0c783ab239ff1d41c2cc79fed5c5cd2286fea79b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c783ab Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild