$ git clone -n https://src.fedoraproject.org/rpms/rust-pyo3.git /var/lib/mock/f40-build-1924376-25102/root/chroot_tmpdir/scmroot/rust-pyo3
Cloning into '/var/lib/mock/f40-build-1924376-25102/root/chroot_tmpdir/scmroot/rust-pyo3'...
$ git fetch origin 96b2bfd34b58df0d0177d758f8dfe219e2eb66c4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pyo3
 * [new ref]         96b2bfd34b58df0d0177d758f8dfe219e2eb66c4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96b2bfd Update to version 0.22.2; Fixes RHBZ#2296165