$ git clone -n https://github.com/fedora-riscv/qt5-qtwebengine.git /var/lib/mock/f39-build-1859010-42458/root/chroot_tmpdir/scmroot/qt5-qtwebengine
Cloning into '/var/lib/mock/f39-build-1859010-42458/root/chroot_tmpdir/scmroot/qt5-qtwebengine'...
$ git fetch origin 2ec496e717e13e11e7f7920027f90b7c968c9173:KOJI_FETCH_HEAD
From https://github.com/fedora-riscv/qt5-qtwebengine
 * [new ref]         2ec496e717e13e11e7f7920027f90b7c968c9173 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ec496e Rebuild for f39-rv64