$ git clone -n https://src.fedoraproject.org/rpms/dtkwidget.git /var/lib/mock/f41-build-841759-161398/root/chroot_tmpdir/scmroot/dtkwidget
Cloning into '/var/lib/mock/f41-build-841759-161398/root/chroot_tmpdir/scmroot/dtkwidget'...
$ git fetch origin 2e5becb012cb7ea0c054516786e07449b6fd307b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtkwidget
 * [new ref]         2e5becb012cb7ea0c054516786e07449b6fd307b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e5becb 5.6.31