$ git clone -n https://src.fedoraproject.org/rpms/rust-tokenizers.git /var/lib/mock/f45-build-45554-823/root/chroot_tmpdir/scmroot/rust-tokenizers
Cloning into '/var/lib/mock/f45-build-45554-823/root/chroot_tmpdir/scmroot/rust-tokenizers'...
$ git fetch origin ae6c35800d3808ffb8cff8d759296fd8a17a5c88:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokenizers
 * [new ref]         ae6c35800d3808ffb8cff8d759296fd8a17a5c88 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae6c358 Update to version 0.23.1