$ git clone -n https://src.fedoraproject.org/rpms/golang-github-matttproud-protobuf-extensions.git /var/lib/mock/f40-build-2447061-61338/root/chroot_tmpdir/scmroot/golang-github-matttproud-protobuf-extensions
Cloning into '/var/lib/mock/f40-build-2447061-61338/root/chroot_tmpdir/scmroot/golang-github-matttproud-protobuf-extensions'...
$ git fetch origin 83e84206020a849c7df8e93f238b46ecde6782c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-matttproud-protobuf-extensions
 * [new ref]         83e84206020a849c7df8e93f238b46ecde6782c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83e8420 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild