$ git clone -n https://src.fedoraproject.org/rpms/protobuf.git /var/lib/mock/f40-build-1966320-25208/root/chroot_tmpdir/scmroot/protobuf
Cloning into '/var/lib/mock/f40-build-1966320-25208/root/chroot_tmpdir/scmroot/protobuf'...
$ git fetch origin f284ce674452e57dd28982ed74d7b4b3736b4312:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/protobuf
 * [new ref]         f284ce674452e57dd28982ed74d7b4b3736b4312 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f284ce6 Fix build with java-21-openjdk