$ git clone -n https://src.fedoraproject.org/rpms/clblast.git /var/lib/mock/f41-build-1046780-19100/root/chroot_tmpdir/scmroot/clblast
Cloning into '/var/lib/mock/f41-build-1046780-19100/root/chroot_tmpdir/scmroot/clblast'...
$ git fetch origin 791677fe33d6bbe03c1c8710c6363f54ee79d8d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clblast
 * [new ref]         791677fe33d6bbe03c1c8710c6363f54ee79d8d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 791677f Update to 1.6.3