$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtx11extras.git /var/lib/mock/f41-build-side-1-2662745-28830/root/chroot_tmpdir/scmroot/qt5-qtx11extras
Cloning into '/var/lib/mock/f41-build-side-1-2662745-28830/root/chroot_tmpdir/scmroot/qt5-qtx11extras'...
$ git fetch origin c5e2f7de186467455aedf20700624ac37484d525:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtx11extras
 * [new ref]         c5e2f7de186467455aedf20700624ac37484d525 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5e2f7d 5.15.15