$ git clone -n https://src.fedoraproject.org/rpms/rust-ct-codecs.git /var/lib/mock/f38-build-side-43-rust-devel-1413752-31445/root/chroot_tmpdir/scmroot/rust-ct-codecs
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413752-31445/root/chroot_tmpdir/scmroot/rust-ct-codecs'...
$ git fetch origin 88cea21e048cde3f62749380e9b03914ca5dde57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ct-codecs
 * [new ref]         88cea21e048cde3f62749380e9b03914ca5dde57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88cea21 Initial import (#2210895)