$ git clone -n https://src.fedoraproject.org/rpms/rust-pyo3-macros.git /var/lib/mock/f42-build-side-1-3505183-45989/root/chroot_tmpdir/scmroot/rust-pyo3-macros
Cloning into '/var/lib/mock/f42-build-side-1-3505183-45989/root/chroot_tmpdir/scmroot/rust-pyo3-macros'...
$ git fetch origin 78f22e532063e413a5a1fe54957d8281656ccdb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pyo3-macros
 * [new ref]         78f22e532063e413a5a1fe54957d8281656ccdb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78f22e5 Update to version 0.24.1; Fixes RHBZ#2351012