$ git clone -n https://src.fedoraproject.org/rpms/rust-tree_magic_db.git /var/lib/mock/f40-build-2328141-58867/root/chroot_tmpdir/scmroot/rust-tree_magic_db
Cloning into '/var/lib/mock/f40-build-2328141-58867/root/chroot_tmpdir/scmroot/rust-tree_magic_db'...
$ git fetch origin 30e94182da5f6881880e233aa49418c34cc327ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tree_magic_db
 * [new ref]         30e94182da5f6881880e233aa49418c34cc327ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30e9418 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild