$ git clone -n https://src.fedoraproject.org/rpms/golang-uber-mock.git /var/lib/mock/f41-build-808477-145885/root/chroot_tmpdir/scmroot/golang-uber-mock
Cloning into '/var/lib/mock/f41-build-808477-145885/root/chroot_tmpdir/scmroot/golang-uber-mock'...
$ git fetch origin 4997ac5a68acf8055cd79577345b3c14f0ab2d5b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-uber-mock
 * [new ref]         4997ac5a68acf8055cd79577345b3c14f0ab2d5b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4997ac5 Update to 0.4.0 - Closes rhbz#2271191 rhbz#2248367