$ git clone -n https://src.fedoraproject.org/rpms/rust-vec1.git /var/lib/mock/f40-build-2683920-67976/root/chroot_tmpdir/scmroot/rust-vec1
Cloning into '/var/lib/mock/f40-build-2683920-67976/root/chroot_tmpdir/scmroot/rust-vec1'...
$ git fetch origin 80c9e6dfaeb8c8d4bf23b9377a45b24db5f04a6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vec1
 * [new ref]         80c9e6dfaeb8c8d4bf23b9377a45b24db5f04a6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 80c9e6d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild