$ git clone -n https://github.com/xcp-ng-rpms/python-pycurl.git /var/lib/mock/v8.3-u-pcoval2-10414-28976/root/chroot_tmpdir/scmroot/python-pycurl
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10414-28976/root/chroot_tmpdir/scmroot/python-pycurl'...
$ git fetch origin 6855ddb0cc49b651fb61aeabb2ed9a34999b0e5a:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/python-pycurl
 * [new ref]         6855ddb0cc49b651fb61aeabb2ed9a34999b0e5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6855ddb bump release for test build