$ git clone -n https://src.fedoraproject.org/rpms/golang-github-etcd-io-gofail.git /var/lib/mock/f39-build-1512409-35565/root/chroot_tmpdir/scmroot/golang-github-etcd-io-gofail
Cloning into '/var/lib/mock/f39-build-1512409-35565/root/chroot_tmpdir/scmroot/golang-github-etcd-io-gofail'...
$ git fetch origin 996f5bddd2c3c814e847d2f83fd83f1ffd3a8627:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-etcd-io-gofail
 * [new ref]         996f5bddd2c3c814e847d2f83fd83f1ffd3a8627 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 996f5bd Update spec - Fixes rhbz#2225850 rhbz#2171511