$ git clone -n https://src.fedoraproject.org/rpms/ignition.git /var/lib/mock/f45-build-14039-456/root/chroot_tmpdir/scmroot/ignition
Cloning into '/var/lib/mock/f45-build-14039-456/root/chroot_tmpdir/scmroot/ignition'...
$ git fetch origin b11239380669ea34a9a5fd534d8e2aa8c99b7d1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ignition
 * [new ref]         b11239380669ea34a9a5fd534d8e2aa8c99b7d1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b112393 Update to 2.27.0