$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtwebchannel.git /var/lib/mock/f40-build-2269687-54777/root/chroot_tmpdir/scmroot/qt5-qtwebchannel
Cloning into '/var/lib/mock/f40-build-2269687-54777/root/chroot_tmpdir/scmroot/qt5-qtwebchannel'...
$ git fetch origin f53985b54e298ea03848d20c196fdb2131131721:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtwebchannel
 * [new ref]         f53985b54e298ea03848d20c196fdb2131131721 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f53985b 5.15.12