$ git clone -n https://src.fedoraproject.org/rpms/stellarium.git /var/lib/mock/f45-build-109286-17222/root/chroot_tmpdir/scmroot/stellarium
Cloning into '/var/lib/mock/f45-build-109286-17222/root/chroot_tmpdir/scmroot/stellarium'...
$ git fetch origin cdfe81fdb1a3e62e3293dcce8846656e6615c46f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stellarium
 * [new ref]         cdfe81fdb1a3e62e3293dcce8846656e6615c46f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cdfe81f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild