$ git clone -n https://src.fedoraproject.org/rpms/dc3dd.git /var/lib/mock/f42-build-3528286-46309/root/chroot_tmpdir/scmroot/dc3dd
Cloning into '/var/lib/mock/f42-build-3528286-46309/root/chroot_tmpdir/scmroot/dc3dd'...
$ git fetch origin e15b0c4a6fe1ce9f4ec4a086f89f493bab8189a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dc3dd
 * [new ref]         e15b0c4a6fe1ce9f4ec4a086f89f493bab8189a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e15b0c4 switch to autochangelog / autorelease