$ git clone -n https://src.fedoraproject.org/rpms/qalculate-qt.git /var/lib/mock/f40-build-769105-125494/root/chroot_tmpdir/scmroot/qalculate-qt
Cloning into '/var/lib/mock/f40-build-769105-125494/root/chroot_tmpdir/scmroot/qalculate-qt'...
$ git fetch origin f9d5a1e6ea2b3efa6b9410b5186477b502bd4d09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qalculate-qt
 * [new ref]         f9d5a1e6ea2b3efa6b9410b5186477b502bd4d09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9d5a1e Update to 4.9.0 (close RHBZ#2251742)