$ git clone -n https://src.fedoraproject.org/rpms/python-x2go.git /var/lib/mock/f40-build-2107155-50596/root/chroot_tmpdir/scmroot/python-x2go
Cloning into '/var/lib/mock/f40-build-2107155-50596/root/chroot_tmpdir/scmroot/python-x2go'...
$ git fetch origin c49b058292d8f17daab293d24a286c946641a680:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-x2go
 * [new ref]         c49b058292d8f17daab293d24a286c946641a680 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c49b058 Drop BR /usr/bin/2to3, not needed