$ git clone -n https://src.fedoraproject.org/rpms/golang-github-facebook-time.git /var/lib/mock/f41-build-3149839-40538/root/chroot_tmpdir/scmroot/golang-github-facebook-time
Cloning into '/var/lib/mock/f41-build-3149839-40538/root/chroot_tmpdir/scmroot/golang-github-facebook-time'...
$ git fetch origin f4687d007a77927fca62dcbc4139f9a9afaf4820:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-facebook-time
 * [new ref]         f4687d007a77927fca62dcbc4139f9a9afaf4820 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4687d0 Merge #26 `Build latest`