$ git clone -n https://src.fedoraproject.org/rpms/qalculate-qt.git /var/lib/mock/f45-build-33869-674/root/chroot_tmpdir/scmroot/qalculate-qt
Cloning into '/var/lib/mock/f45-build-33869-674/root/chroot_tmpdir/scmroot/qalculate-qt'...
$ git fetch origin b5c50dde98e39eecc0e07597e14699fd947fa498:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qalculate-qt
 * [new ref]         b5c50dde98e39eecc0e07597e14699fd947fa498 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5c50dd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild