$ git clone -n https://src.fedoraproject.org/rpms/dtk6widget.git /var/lib/mock/f41-build-840206-160595/root/chroot_tmpdir/scmroot/dtk6widget
Cloning into '/var/lib/mock/f41-build-840206-160595/root/chroot_tmpdir/scmroot/dtk6widget'...
$ git fetch origin 6df751ab449b6ec98ede3b4927ae3bedee5388e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtk6widget
 * [new ref]         6df751ab449b6ec98ede3b4927ae3bedee5388e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6df751a initial import; rhbz#2283288