$ git clone -n https://github.com/xcp-ng-rpms/python-pycurl.git /var/lib/mock/v8.3-u-pcoval2-10075-28701/root/chroot_tmpdir/scmroot/python-pycurl
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10075-28701/root/chroot_tmpdir/scmroot/python-pycurl'...
$ git fetch origin 1936c73c1a1f81bf92355ac032422646d96b3c77:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/python-pycurl
 * [new ref]         1936c73c1a1f81bf92355ac032422646d96b3c77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1936c73 bump release for test build