$ git clone -n https://src.fedoraproject.org/rpms/python-pyqt5-sip.git /var/lib/mock/f45-build-32340-659/root/chroot_tmpdir/scmroot/python-pyqt5-sip
Cloning into '/var/lib/mock/f45-build-32340-659/root/chroot_tmpdir/scmroot/python-pyqt5-sip'...
$ git fetch origin 4dd6c5912f91eb7f4091bd3d53214c14eaf802f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pyqt5-sip
 * [new ref]         4dd6c5912f91eb7f4091bd3d53214c14eaf802f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4dd6c59 Update to new upstream release 12.19.0 (#2510134)