$ git clone -n https://src.fedoraproject.org/rpms/deja-dup.git /var/lib/mock/f42-build-3528302-46309/root/chroot_tmpdir/scmroot/deja-dup
Cloning into '/var/lib/mock/f42-build-3528302-46309/root/chroot_tmpdir/scmroot/deja-dup'...
$ git fetch origin 01e9fcf0ae05d7c9c6fa800f84d7372b348de550:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/deja-dup
 * [new ref]         01e9fcf0ae05d7c9c6fa800f84d7372b348de550 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01e9fcf 48.1