$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtxmlpatterns.git /var/lib/mock/f39-build-1568621-37661/root/chroot_tmpdir/scmroot/qt5-qtxmlpatterns
Cloning into '/var/lib/mock/f39-build-1568621-37661/root/chroot_tmpdir/scmroot/qt5-qtxmlpatterns'...
$ git fetch origin c5f515c399620a25c7402ae1de60caf44a48b9b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtxmlpatterns
 * [new ref]         c5f515c399620a25c7402ae1de60caf44a48b9b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5f515c 5.15.11