$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-io.git /var/lib/mock/f40-build-2084037-49984/root/chroot_tmpdir/scmroot/rust-tokio-io
Cloning into '/var/lib/mock/f40-build-2084037-49984/root/chroot_tmpdir/scmroot/rust-tokio-io'...
$ git fetch origin 61697b7af1c9488cb3dd45ca01e4b0bc219c02c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-io
 * [new ref]         61697b7af1c9488cb3dd45ca01e4b0bc219c02c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61697b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild