$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtxmlpatterns.git /var/lib/mock/f42-build-side-1-3582070-46857/root/chroot_tmpdir/scmroot/qt5-qtxmlpatterns
Cloning into '/var/lib/mock/f42-build-side-1-3582070-46857/root/chroot_tmpdir/scmroot/qt5-qtxmlpatterns'...
$ git fetch origin c697e81e7602b14fdc820eccc3e312bc2eca79ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtxmlpatterns
 * [new ref]         c697e81e7602b14fdc820eccc3e312bc2eca79ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c697e81 5.15.17