$ git clone -n https://src.fedoraproject.org/rpms/ignition.git /var/lib/mock/f40-build-2192588-51471/root/chroot_tmpdir/scmroot/ignition
Cloning into '/var/lib/mock/f40-build-2192588-51471/root/chroot_tmpdir/scmroot/ignition'...
$ git fetch origin a14d6588b3ce145632526861bfef839c1f3287b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ignition
 * [new ref]         a14d6588b3ce145632526861bfef839c1f3287b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a14d658 Add ignition-grub subpackage