$ git clone -n https://src.fedoraproject.org/rpms/dtk6widget.git /var/lib/mock/f42-build-868493-176129/root/chroot_tmpdir/scmroot/dtk6widget
Cloning into '/var/lib/mock/f42-build-868493-176129/root/chroot_tmpdir/scmroot/dtk6widget'...
$ git fetch origin ec11e1c9b86f78be51017ed81db76de79eb47f68:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtk6widget
 * [new ref]         ec11e1c9b86f78be51017ed81db76de79eb47f68 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec11e1c 6.0.25