$ git clone -n https://src.fedoraproject.org/rpms/squeekboard.git /var/lib/mock/f42-build-875539-179304/root/chroot_tmpdir/scmroot/squeekboard
Cloning into '/var/lib/mock/f42-build-875539-179304/root/chroot_tmpdir/scmroot/squeekboard'...
$ git fetch origin 71cfa8f5612f2418b281cffcd32d390d1540ede7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/squeekboard
 * [new ref]         71cfa8f5612f2418b281cffcd32d390d1540ede7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71cfa8f Disable building for i686