$ git clone -n https://src.fedoraproject.org/rpms/slic3r.git /var/lib/mock/f40-build-780820-131334/root/chroot_tmpdir/scmroot/slic3r
Cloning into '/var/lib/mock/f40-build-780820-131334/root/chroot_tmpdir/scmroot/slic3r'...
$ git fetch origin 530f46d3cb5f89be52ea1232821d63f9c0b20c62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/slic3r
 * [new ref]         530f46d3cb5f89be52ea1232821d63f9c0b20c62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 530f46d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild