$ git clone -n https://src.fedoraproject.org/rpms/golang-github-protobuf.git /var/lib/mock/f39-build-1503857-34989/root/chroot_tmpdir/scmroot/golang-github-protobuf
Cloning into '/var/lib/mock/f39-build-1503857-34989/root/chroot_tmpdir/scmroot/golang-github-protobuf'...
$ git fetch origin 4e6a0eef0125994438c9b891dab54b3ad7517a76:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-protobuf
 * [new ref]         4e6a0eef0125994438c9b891dab54b3ad7517a76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e6a0ee rebuild in hopes of addressing issues with golang-github-nats-io