$ git clone -n https://src.fedoraproject.org/rpms/qalculate-gtk.git /var/lib/mock/f39-build-1595020-38323/root/chroot_tmpdir/scmroot/qalculate-gtk
Cloning into '/var/lib/mock/f39-build-1595020-38323/root/chroot_tmpdir/scmroot/qalculate-gtk'...
$ git fetch origin e575d0ccbf9c4332a764e863d6dea8caeba68ec8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qalculate-gtk
 * [new ref]         e575d0ccbf9c4332a764e863d6dea8caeba68ec8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e575d0c update to v4.8.1