$ git clone -n https://src.fedoraproject.org/rpms/rust-sec1.git /var/lib/mock/f40-build-2656759-66915/root/chroot_tmpdir/scmroot/rust-sec1
Cloning into '/var/lib/mock/f40-build-2656759-66915/root/chroot_tmpdir/scmroot/rust-sec1'...
$ git fetch origin 81bca5d1c94f6d7a6aec4404bfd8b655e5be9ca6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sec1
 * [new ref]         81bca5d1c94f6d7a6aec4404bfd8b655e5be9ca6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81bca5d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild