$ git clone -n https://src.fedoraproject.org/rpms/python-tkrzw.git /var/lib/mock/f38-build-719326-96949/root/chroot_tmpdir/scmroot/python-tkrzw
Cloning into '/var/lib/mock/f38-build-719326-96949/root/chroot_tmpdir/scmroot/python-tkrzw'...
$ git fetch origin 83872b27d4a0e31021190c71430b431f2a0c1935:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-tkrzw
 * [new ref]         83872b27d4a0e31021190c71430b431f2a0c1935 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83872b2 Version bump