$ git clone -n https://src.fedoraproject.org/rpms/python-plac.git /var/lib/mock/f39-build-1581063-38079/root/chroot_tmpdir/scmroot/python-plac
Cloning into '/var/lib/mock/f39-build-1581063-38079/root/chroot_tmpdir/scmroot/python-plac'...
$ git fetch origin 67bfeb48c156fdc81ac43446cab076cfb3723673:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-plac
 * [new ref]         67bfeb48c156fdc81ac43446cab076cfb3723673 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67bfeb4 Update to 1.4.1 (close RHBZ#2246447)