$ git clone -n https://src.fedoraproject.org/rpms/pygrib.git /var/lib/mock/f41-build-852576-166409/root/chroot_tmpdir/scmroot/pygrib
Cloning into '/var/lib/mock/f41-build-852576-166409/root/chroot_tmpdir/scmroot/pygrib'...
$ git fetch origin 068a984ac99622259c0e7fa9233945ff79c55ce9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pygrib
 * [new ref]         068a984ac99622259c0e7fa9233945ff79c55ce9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 068a984 update to version 2.1.6