$ git clone -n https://src.fedoraproject.org/rpms/libpasastro.git /var/lib/mock/f42-build-3280216-41340/root/chroot_tmpdir/scmroot/libpasastro
Cloning into '/var/lib/mock/f42-build-3280216-41340/root/chroot_tmpdir/scmroot/libpasastro'...
$ git fetch origin 4e1b78cdc090adead6f13c7b83562eab5a7fe548:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libpasastro
 * [new ref]         4e1b78cdc090adead6f13c7b83562eab5a7fe548 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e1b78c Disable i686 builds