$ git clone -n https://src.fedoraproject.org/rpms/rust-libbpf-cargo0.21.git /var/lib/mock/f40-build-1780660-24818/root/chroot_tmpdir/scmroot/rust-libbpf-cargo0.21
Cloning into '/var/lib/mock/f40-build-1780660-24818/root/chroot_tmpdir/scmroot/rust-libbpf-cargo0.21'...
$ git fetch origin 7cf6bb21062b69c3f955f794cbdd86b160fef7aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libbpf-cargo0.21
 * [new ref]         7cf6bb21062b69c3f955f794cbdd86b160fef7aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7cf6bb2 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild