$ git clone -n https://github.com/xcp-ng-rpms/python-pycurl.git /var/lib/mock/v8.3-u-pcoval2-10584-29138/root/chroot_tmpdir/scmroot/python-pycurl
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10584-29138/root/chroot_tmpdir/scmroot/python-pycurl'...
$ git fetch origin b3627bad69baac7be5eeef7203380b9b8f41c2ec:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/python-pycurl
 * [new ref]         b3627bad69baac7be5eeef7203380b9b8f41c2ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3627ba bump release for test build