$ git clone -n https://src.fedoraproject.org/rpms/golang-cloud-google-longrunning.git /var/lib/mock/f41-build-1285118-23248/root/chroot_tmpdir/scmroot/golang-cloud-google-longrunning
Cloning into '/var/lib/mock/f41-build-1285118-23248/root/chroot_tmpdir/scmroot/golang-cloud-google-longrunning'...
$ git fetch origin 86768c9e269f8cd72c4917b809e4bafe2967fb3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-cloud-google-longrunning
 * [new ref]         86768c9e269f8cd72c4917b809e4bafe2967fb3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86768c9 Update to 0.5.7