$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtwebchannel.git /var/lib/mock/f41-build-847189-163786/root/chroot_tmpdir/scmroot/qt5-qtwebchannel
Cloning into '/var/lib/mock/f41-build-847189-163786/root/chroot_tmpdir/scmroot/qt5-qtwebchannel'...
$ git fetch origin b06ab38ce978dbe6fbd1057403048ecacd4c4005:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtwebchannel
 * [new ref]         b06ab38ce978dbe6fbd1057403048ecacd4c4005 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b06ab38 5.15.15