$ git clone -n https://src.fedoraproject.org/rpms/workflow.git /var/lib/mock/f40-build-1768861-24748/root/chroot_tmpdir/scmroot/workflow
Cloning into '/var/lib/mock/f40-build-1768861-24748/root/chroot_tmpdir/scmroot/workflow'...
$ git fetch origin 9961f4c3ea35fdc98d5221a2231807e3978461ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/workflow
 * [new ref]         9961f4c3ea35fdc98d5221a2231807e3978461ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9961f4c 0.11.3