$ git clone -n https://github.com/xcp-ng-rpms/python-pycurl.git /var/lib/mock/v8.3-incoming-10073-28689/root/chroot_tmpdir/scmroot/python-pycurl
Cloning into '/var/lib/mock/v8.3-incoming-10073-28689/root/chroot_tmpdir/scmroot/python-pycurl'...
$ git fetch origin aa848d10b26726a4b3859fbb288574684ff02ad8:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/python-pycurl
 * [new ref]         aa848d10b26726a4b3859fbb288574684ff02ad8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa848d1 Update obsolete patch macro with autosetup