$ git clone -n https://src.fedoraproject.org/rpms/python-timeunit.git /var/lib/mock/f40-build-2204485-51961/root/chroot_tmpdir/scmroot/python-timeunit
Cloning into '/var/lib/mock/f40-build-2204485-51961/root/chroot_tmpdir/scmroot/python-timeunit'...
$ git fetch origin 6ca899f21e369b37b4fb98c3adf7aa1c893f2f5f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-timeunit
 * [new ref]         6ca899f21e369b37b4fb98c3adf7aa1c893f2f5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ca899f Orphaned for 6+ weeks