$ git clone -n https://src.fedoraproject.org/rpms/miracle-wm.git /var/lib/mock/f42-build-side-1-3504297-45983/root/chroot_tmpdir/scmroot/miracle-wm
Cloning into '/var/lib/mock/f42-build-side-1-3504297-45983/root/chroot_tmpdir/scmroot/miracle-wm'...
$ git fetch origin 9e9ab3da9e108b9afac860c81a897cc0bf5015f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/miracle-wm
 * [new ref]         9e9ab3da9e108b9afac860c81a897cc0bf5015f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e9ab3d Update to 0.5.1