$ git clone -n https://src.fedoraproject.org/rpms/stellarium.git /var/lib/mock/f41-build-856034-167435/root/chroot_tmpdir/scmroot/stellarium
Cloning into '/var/lib/mock/f41-build-856034-167435/root/chroot_tmpdir/scmroot/stellarium'...
$ git fetch origin 2fa909fd93005d18768f074cc1a2ac3086fab799:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stellarium
 * [new ref]         2fa909fd93005d18768f074cc1a2ac3086fab799 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fa909f 24.3