$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_repr.git /var/lib/mock/f40-build-2487886-61651/root/chroot_tmpdir/scmroot/rust-serde_repr
Cloning into '/var/lib/mock/f40-build-2487886-61651/root/chroot_tmpdir/scmroot/rust-serde_repr'...
$ git fetch origin 86148e3b926be5ca79e741909cc75873909e340a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_repr
 * [new ref]         86148e3b926be5ca79e741909cc75873909e340a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86148e3 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild