$ git clone -n https://src.fedoraproject.org/rpms/golang-cloud-google.git /var/lib/mock/f40-build-2561761-62139/root/chroot_tmpdir/scmroot/golang-cloud-google
Cloning into '/var/lib/mock/f40-build-2561761-62139/root/chroot_tmpdir/scmroot/golang-cloud-google'...
$ git fetch origin d385b6877ca9ed6b771cb54f4d0765c5b04d4366:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-cloud-google
 * [new ref]         d385b6877ca9ed6b771cb54f4d0765c5b04d4366 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d385b68 Don't include internal/generated/snippets