$ git clone -n https://src.fedoraproject.org/rpms/flaw.git /var/lib/mock/f45-build-9046-398/root/chroot_tmpdir/scmroot/flaw
Cloning into '/var/lib/mock/f45-build-9046-398/root/chroot_tmpdir/scmroot/flaw'...
$ git fetch origin d104aa326c9a89f0cd331247936fc23513098122:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flaw
 * [new ref]         d104aa326c9a89f0cd331247936fc23513098122 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d104aa3 opt-in to packit for rawhide