$ git clone -n https://src.fedoraproject.org/rpms/rust-pyo3-macros.git /var/lib/mock/f39-build-2204624-51965/root/chroot_tmpdir/scmroot/rust-pyo3-macros
Cloning into '/var/lib/mock/f39-build-2204624-51965/root/chroot_tmpdir/scmroot/rust-pyo3-macros'...
$ git fetch origin 8b5d4dfd1555204963a6485958c603c4544d1cd4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pyo3-macros
 * [new ref]         8b5d4dfd1555204963a6485958c603c4544d1cd4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b5d4df Update to version 0.20.2; Fixes RHBZ#2256873