$ git clone -n https://src.fedoraproject.org/rpms/rust-simple_asn1.git /var/lib/mock/f40-build-2083761-49964/root/chroot_tmpdir/scmroot/rust-simple_asn1
Cloning into '/var/lib/mock/f40-build-2083761-49964/root/chroot_tmpdir/scmroot/rust-simple_asn1'...
$ git fetch origin 545a33d724b7fa23f43f698af4cac49034036b07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-simple_asn1
 * [new ref]         545a33d724b7fa23f43f698af4cac49034036b07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 545a33d Regenerate with rust2rpm v24