$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtwebview.git /var/lib/mock/f40-build-800467-143563/root/chroot_tmpdir/scmroot/qt5-qtwebview
Cloning into '/var/lib/mock/f40-build-800467-143563/root/chroot_tmpdir/scmroot/qt5-qtwebview'...
$ git fetch origin 0c21d62dc6a7ec8ac4419945b7da62b4fe21bdfe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtwebview
 * [new ref]         0c21d62dc6a7ec8ac4419945b7da62b4fe21bdfe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c21d62 5.15.13