$ git clone -n https://src.fedoraproject.org/rpms/golang-github-matttproud-protobuf-extensions.git /var/lib/mock/f40-build-2001323-44573/root/chroot_tmpdir/scmroot/golang-github-matttproud-protobuf-extensions
Cloning into '/var/lib/mock/f40-build-2001323-44573/root/chroot_tmpdir/scmroot/golang-github-matttproud-protobuf-extensions'...
$ git fetch origin a16e5ffa00d5624c2f31efa8878a919b282370a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-matttproud-protobuf-extensions
 * [new ref]         a16e5ffa00d5624c2f31efa8878a919b282370a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a16e5ff Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild