$ git clone -n https://src.fedoraproject.org/rpms/rust-pyo3-macros-backend.git /var/lib/mock/f40-build-2251051-54106/root/chroot_tmpdir/scmroot/rust-pyo3-macros-backend
Cloning into '/var/lib/mock/f40-build-2251051-54106/root/chroot_tmpdir/scmroot/rust-pyo3-macros-backend'...
$ git fetch origin fa2d8e20808a578b135d1fd7b2cdf2fed1baaead:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pyo3-macros-backend
 * [new ref]         fa2d8e20808a578b135d1fd7b2cdf2fed1baaead -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa2d8e2 Update to version 0.20.2; Fixes RHBZ#2256872