$ git clone -n https://src.fedoraproject.org/rpms/Mayavi.git /var/lib/mock/f40-build-1230013-22855/root/chroot_tmpdir/scmroot/Mayavi
Cloning into '/var/lib/mock/f40-build-1230013-22855/root/chroot_tmpdir/scmroot/Mayavi'...
$ git fetch origin 3f75ec3c47dbe46bff09b21271a7e9a642b5c877:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/Mayavi
 * [new ref]         3f75ec3c47dbe46bff09b21271a7e9a642b5c877 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f75ec3 Update to 4.8.2