$ git clone -n https://src.fedoraproject.org/rpms/rust-pyo3.git /var/lib/mock/f42-build-side-1-3588346-46945/root/chroot_tmpdir/scmroot/rust-pyo3
Cloning into '/var/lib/mock/f42-build-side-1-3588346-46945/root/chroot_tmpdir/scmroot/rust-pyo3'...
$ git fetch origin bf2711fd2b09b7a180e0e4262dcb0ed24d5c0456:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pyo3
 * [new ref]         bf2711fd2b09b7a180e0e4262dcb0ed24d5c0456 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf2711f Update to version 0.25.1; Fixes RHBZ#2372590