$ git clone -n https://src.fedoraproject.org/rpms/rust-pyo3.git /var/lib/mock/f40-build-2249013-53976/root/chroot_tmpdir/scmroot/rust-pyo3
Cloning into '/var/lib/mock/f40-build-2249013-53976/root/chroot_tmpdir/scmroot/rust-pyo3'...
$ git fetch origin 6e120ee809fed7fda82e81eba534a5caa40b208d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pyo3
 * [new ref]         6e120ee809fed7fda82e81eba534a5caa40b208d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e120ee Update to version 0.20.2; Fixes RHBZ#2256871