$ git clone -n https://src.fedoraproject.org/rpms/rust-tls_codec.git /var/lib/mock/f45-build-45477-823/root/chroot_tmpdir/scmroot/rust-tls_codec
Cloning into '/var/lib/mock/f45-build-45477-823/root/chroot_tmpdir/scmroot/rust-tls_codec'...
$ git fetch origin 3454cbfdce0fa629e0690fc97fe41715883b7eb6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tls_codec
 * [new ref]         3454cbfdce0fa629e0690fc97fe41715883b7eb6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3454cbf initial import (resolves rhbz#2487101)