$ git clone -n https://src.fedoraproject.org/rpms/python-qt5.git /var/lib/mock/f40-build-800476-143581/root/chroot_tmpdir/scmroot/python-qt5
Cloning into '/var/lib/mock/f40-build-800476-143581/root/chroot_tmpdir/scmroot/python-qt5'...
$ git fetch origin 96fde4a8507a6eae439d529f225e460a32bd84a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-qt5
 * [new ref]         96fde4a8507a6eae439d529f225e460a32bd84a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96fde4a Rebuild (qt5)