$ git clone -n https://src.fedoraproject.org/rpms/cockpit-machines.git /var/lib/mock/f41-build-side-1-2882845-34495/root/chroot_tmpdir/scmroot/cockpit-machines
Cloning into '/var/lib/mock/f41-build-side-1-2882845-34495/root/chroot_tmpdir/scmroot/cockpit-machines'...
$ git fetch origin c014bf278168ca4eb82fd4155877f791cbeb39fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cockpit-machines
 * [new ref]         c014bf278168ca4eb82fd4155877f791cbeb39fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c014bf2 Update to 320 upstream release